The weapons for crafting weapons (or other items) in Third Edition are documented in the Players Handbook, pages 65-66.
Although running a
player character through these rules might have fun, for a NPC run by the dungeon
master it would take entirely too long. This is particularly true if
your party would like to have a large number of items that need to be
crafted. So figured I would whip up a web page for
suffering dungeon masters everywhere.