Can't Find My Derailleur Hanger My Derailleur Hanger broke and I want to replace it. However, I couldn't find any information about my bike or model or what kind of hanger I need to buy. The brand is Esperia and model name is Aria.

Here is the photo of the broken hanger:



I even tried calling the seller, they said they can't help me with that since they are just resellers. 

So, I tried to check the bike to see if I can find anything helpful and I saw that speed gear was Shimano RD-2300. Is the hanger special to this Shimano model, If no how can I find the correct hanger for my bike?
Yours rotated looks like 

Best I could find is http://wheelsmfg.com/derailleur-hanger-6.html 
which is "similar" but the mount holes look too large, the duck bill is way wrong, and the curve is there but wrong.

The holes might kill it, but its possible the other parts aren't critical.  



Don't bother with the emergency hangers for long term use - they don't last long and they don't work well.