Well, you can do this the expensive way, or the inexpensive way, or the easiest way of course. Your time and risk have expenses attached to them as well, don't they? //content.invisioncic.com/y282845/emoticons/wink.gif.608e3ea05f1a9f98611af0861652f8fb.gif
The expensive way would be to order online from Select Products, or one of those fabrication supply centers - of course, they do their best to stock the best products.
The inexpensive way would be to locate an online source of fiberglass supplies - maybe an online boating center - Google is your friend. //content.invisioncic.com/y282845/emoticons/wink.gif.608e3ea05f1a9f98611af0861652f8fb.gif
The easy way is to just open up your yellow pages to "boating supplies", and start calling them up. Any boating supply shop worth their weight will sell roving, weave, and chopmat in bulk... as well as selling prepackaged supplies.