ARMSTRONG TOOL AND SUPPLY
31541 West 8 mile Rd./Livonia, MI 48152
Knowledgeable staff, fast service. Even have a great storefront to visit.
They're in MICH so postal is quick.
Extensive stock, fast and reliable service with reasonable shipping.
CONTENTI JEWELRY SUPPLIES
New York, New York.
Metals, tools, bead, supplies. Good source for copper, brass bronze sheet, wire etc.
HAUSER AND MILLER
St. Louis, MO
Good source for precious metals.
Winter Park, FL
Similar to Metalliferous although they carry a lot more stuff. Tools, metals (base and precious, sheet and wire), beads, blah blah.