Good online fabric shops?

Hello everyone, I'm looking for a pretty specific fabric for a costume. Our local Ren fair is coming up in a few months and I'm hoping to go as a dragon this year. I haven't decided exactly what I'm going to be doing for the outfit part of my costume yet (which if you have suggestions for that I'm all ears.) But I have decided that I want to be a green dragon. So I'm looking for a scale patterned fabric that is green. Plus seeing as it gets decently hot here around that time of year it being breathable is a must, so preferably cotton.

The issue is that the only dragon scale fabrics I've been able to find in the past have not been made of cotton. They've either been like a thick almost rubber material or almost like spandex but thicker. My local stores don't really carry scale print fabric. So does anyone know of any online shops I could look at? I haven't had much luck on Amazon in the past so I would prefer to stay away from it. Thank you in advance.