Speaker Grille Cloth

I looking into helping a friend replace the grille cloth on a pair of old Polks. Do any of you have any suggestions regarding what type of cloth/foam to use and where to get it. Cost?? Please advise, and thanks in advance!

partsexpress.com

JSE

Thanks JSE, I'm heading there now.

try fabric outlets/stores for crafts and such.. you should be able to find whatever you wanna get in a variety of colors.. maybe even get some foam and cut shapes to make a backing so your material has a design?.. just some ideas