Fyberdyne Laboratories - http://www.fyberdyne.com/

Total Fabrications also sells armor, though a limited selection - http://www.totalfab.com/armour.html.

Armor Cheats and Fakes - http://www.alleycatscratch.com/lotr/Armor/ArmorCheats.htm

Very good visual tutorial on making your own armor using rings - http://derakon.chainmailstore.com/

Maille Artisans International League - http://www.mailleartisans.org/

Craft foam armor tutorial - http://entropyhouse.com/penwiper/costumes/helmsdeep.html

Elf armor tutorial - http://www.jedielfqueen.com/elvenwarriors/elvenwarriors.htm

“Armor for the Fiberglass Phobic” thread recreation - http://amethyst-angel.com/armormaking.html