Have you tried Spoonflower.com to create your own fabrics? You create the design, upload it, and then you can order your own fabric! I haven't yet tried it - but it seems like fun.
I don't think you're able to order other folks fabric designs, but it is sure fun to look! One of my FAVORITE designers is Nalo Hopkinson from Canada. Sistah designer created this Colored Lady from New Orleans print and this Seaworthy print. Click here to see the Paper Doll design. Or, click here to see Nalo's Creole Print. And, finally, click here for her Honeybun print featuring a little boy.
Don't you just want to incorporate her designs into a quilt?! Which one do you enjoy the most? Enjoy!