If you can't find one try entering coc qasmoke in the console, and look in the standard equipment.
If it exists, it will be in there, if not, you're out of luck.
Remember, you don't have to take anything, just see if it exists or not.
Warning:
Don't open the enchanted armour/weapons cabinet, as it may crash or lag your game.
gaming.stackexchange.com/users/15232/dark
There is a clothing store in Solitude, with a sign of a ball of yarn closest store from where you fast travel too, they sell all random clothing items.
I've found a few "Hoods" from there.
And anyone saying they don't sell them empty is ridiculous, thats the entire point of enchanting and you can only make the best mage armor by enchanting them yourself
gaming.stackexchange.com/users/15313/TnB
Enthir in the mages college sells non-enchanted robes, but can only be found or obtained if high in speech.
They also cost a pretty penny with speech all the way to 100 with no perks a master robe with no enchantments is roughly 5000 gold.
Hoped this helps.
gaming.stackexchange.com/users/17743/Jake
Go to fellglow keep, in the circular room with all of the bookshelves there is one pair of unenchanted hooded black robes.
They are the only ones in the entire game.
Good luckTo you.
And yes you can get them even if you have already been there.
Happy questing!
gaming.stackexchange.com/users/27579/Master Mage
I dont recall finding any non-enchanted robes in my Skyrim journey so far.
I just went to the Radiant Raiment in Solitude to look and see what they have.
They DO have a Blue Robe but it is not hooded.
I hope that I am wrong so that you can get the look your going for.
gaming.stackexchange.com/users/14985/Zachary Cash
Yes, they do exist, I just went into Radiant Rainments in Solitude, and found them.
They are called College Robes, and cost me 28 gold.
Keep looking if you haven't found them yet.
gaming.stackexchange.com/users/18791/cookiedude1
Defeat Mayln Veran and take his robes before the star kicks you out.
I just got mine for the first time.
gaming.stackexchange.com/users/39375/Ghost_0shells
I think I found a blue and black set at the general store in Winterhold.
I've found quite a few, not sure where the rest were though.
gaming.stackexchange.com/users/15897/Madison
There are no unenchanted hooded or unhooded thalmor robes in the game.
However i know where you are coming from with the look, i like to roll thalmor gear too.
Heres what i do, over enchant the stats on the gear you can (rings, gloves, boots, circlet) and roll the thalmor robes regardless.
With the beefy stats on the gear you can enchant, you arent going to miss much when it comes to the states you can enchant on robes (magic regen and minus destruction cost).
gaming.stackexchange.com/users/16895/M1557
I kill the annoying monk in whiterun
and I steal his nice yellow hooded robe,
and then I enchant myself.
gaming.stackexchange.com/users/18277/Jeremias Jose
Just kill some monks in a temple and then buy the mage hood from Colette Marence.
Each time it respawns, it will be a higher level.
gaming.stackexchange.com/users/18811/alto stratus
I can't seem to find an non-enchanted version of this outfit anywhere. It is the same clothing all court wizards use, but I need an non-enchanted version (preferably without using the console), so that I can enchant it myself.  Has anyone come across any non-enchanted Hooded Mage's Robes? Can they even be found in a non-enchanted form?
Where can I get non-enchanted Hooded Mage's Robes?
gaming.stackexchange.com
<the-elder-scrolls-5-skyrim>
gaming.stackexchange.com/questions/38152
gaming.stackexchange.com/users/9935/I Phantasm I
There is a clothing store in Solitude. Enthir sells non-enchanted robes as well as the general store in Winterfold. You can also defest Mayln Veran and take his robes. While few players tend to believe that you can't find unenchanted robes anywhere in Skyrim, few others speak about different locations that there might be one.
Players listing possible locations where unenchanted robes can be found. It is implied that there are no unenchanted robes.