Where can I find twin XL bedding (for a dorm room) that isn't super cheap quality?

I’m headed to college in the fall so, being my OCD, interior design obsessed self, I’m starting to look for things for my dorm room.
Disclaimer: I’m admittedly pretty picky and my bedding needs to be 100% cotton.

However, I’m finding it surprisingly difficult to find bedding. I’m not interested in the Bed Bath & Beyond, $50 “bed in a bag” type of deal. I don’t have a problem with a whole bedding set like that in theory, but I’m finding that they’re pretty much all tacky and made out of cheap, uncomfortable materials. (Zebra print and hot pink polyester? No thanks.)

I’ve found a few other options but there’s apparently a very limited market for attractive, well-made dorm bedding. Any tips on where I could look for some nicer twin XL bedding would be greatly appreciated!