There are lots of marine suppliers out there and an internet seach will turn up lots of resources to try.
It seems though, that I do find myself constantly returning to these:
Literature and Plans
Wooden Boat Magazine- www.woodenboat.com
Hardware and Supplies
Hamilton Marine- www.hamiltonmarine.com
Jamestown Distributors- www.jamestowndistributors.com
Fiberglass and Resin
These two companies sell epoxy resin at a much lower cost than normal marine stores.
I’ve had no problems with quality or durability.
US Composites- www.uscomposites.com
Fiberglass Coatings, Inc – www.fgci.com
Kingston Wooden Boats 