How to purchase Windows for Boot Camp? This is a clean install. New Mac. No previous versions of Windows has been purchased or installed.
I need an ISO, not a DVD because there is no optical drive on the new Macs
Microsoft only sells Windows 8 Update, not the full thing. There is a "system builder" edition out available through some "partners" and apparently it also only comes on DVD.
Windows 7 it seems can be bought from Microsoft but only in certain regions (mine is not included) and only in DVD form.
I see you can get ISOs of Windows 7 from Digital River but that only works if you have a product key, ie. you have already purchased Windows (currently no way to do this, see points 1-4).


Really Microsoft? This is why people run to Pirate Bay. Any solutions welcome :)
If Windows 8 has been released in your country, you should be able to find a reseller with the System Builder version available as a DVD. Local system builders is a pretty big business in most countries so just look around for someone offering custom built Windows systems.  A quick Google search on "create a DVD ISO on OS X" shows lots of how-to articles for that step.

You can either use an external DVD reader (maybe $30) or get somebody with a DVD to create the ISO for you.