Beads, beads and more beads...and any other supply you might use for a beading project.
http://www.ecstasycrafts.com/ A Canadian company but unfortunately has US pricing online.
http://www.alpineflowerandstamps.com
Supplies for every type of paper craft. Plus rubber stamps and stamping accessories.
http://www.loomisandtoles.com/engl/catalogue/index.asp
Selection of paints, brushes, sketching pencils, drafting supplies, and lots more.
http://www.bearwood.com/shop/default.asp
Both these sites have all kinds of wood pieces, project books, painting supplies, parts for clock making...too much stuff to mention!
Having companies listed on this web site is not an endorsement for them or a guarantee of good service