> I'm not a Kayak Builder, but I would appreciate the opportunity to buy a
> few yards of Kevlar fabric. I also don't know what weights the fabric is
> normally available in. Thanks in advance for your help.

Try Raka - I've included a link to their site (which is not very detailed). Their staff is VERY helpful and I've been happy with the fiberglass cloth I've ordered from them. Give them a call if you have questions their site don't answer.