Capitol Metals -- Metal supply company. All of our Aluminum comes from there.
http://www.imsmetals.com/
Port Plastics -- Plastics supply company. All of our polycarb and Delrin comes from there.
http://www.portplastics.com/index2.html
Copper State Nut & Bolt -- Nut and bolt supply company. We get all kinds of screws, nails, nuts, and bolts from there.
http://www.copperstate.com/
Hope these may be of some help!