There are numerous metallics out there. Gunze/Mr. Color, AK Interactive, Vallejo, Alclad.

I have 2 bottles of Testors Metalizer colors left:

Non-Buff Aluminum

Dark Adonic Grey

I love Model Master paints but was sad and disappointed Rustoleum made the decision to stop production of Model Master line. They claim no one uses them anymore or not profitable for their needs. BULL$H!T!!!!

I have Mr. Color Super Duraluminum Metallic Colors and like them a lot.