I used the 12-oz cloth from Dyson, and it was $5/foot. Make sure you order just a foot or two more than you need, just to account for the curve of the keel and give you some slack in case you mismeasure (could happen ;-)

Mark

: We are starting to build three skin on frame kayaks and need some
: information. I can not find a price for ballistic nylon from Dyson. Can
: anyone help. We live in Northern Ontario and the ice will not be out for
: another three months. I think this will give us enough time for three guys
: to build the kayaks. Regards, Erich.