hi guys try this place for ripstop its cheap and exellent quality too,never had a problem with them either and they deliver fast too.by the way for battens i allways use the thin plastic stuff you get on cartons ,you know the see through stuff you get on kids toy boxes etc.i cut it to length and attach to the sails using double sided tape.it never lets go even in high winds and rain.in fact i never sew my sails ever i allways use double sided tape for all seems etc any stationers sell the tape.[link]http://stores.ebay.co.uk/Fabrics-n-Stuff_Ripstop-Proofed-Nylon_W0QQcolZ4QQdirZ1QQfsubZ4QQftidZ2QQtZkm[/link]