Metal paint mixing dish. Where to buy?

Hey guys.

Im after a small metal dish to mix paint in. Sort of like a petrie dish you use in high school chemistry. Any ideas where i can order a few? Does a hobby brand make them?

Any help would be appreciated. Im undertaking a non vehicular project at the moment (Tamiya 1/32 F-16CJ), and i want to nail all the colors right :)

Like this?
http://www.hwjapan.com/sh/MAN003.aspx
It's 48mm in diameter.

I use small foil ones - handy for bending into a pouring spout. These ones come in a pack of six with free pies.

I save my beer bottle caps for mixing custom colors.