Looking for some 52oz bases

[DasGrinch]

I'm not looking for anything fancy, plain silver is fine, I've just had a hard time locating any in the right size, and nothing has shown up at the local thrift shops.  I bought a half dozen globes from American Science and Surplus, but I have only one base to display them.  If anyone could point me to a source for them, I'd much appreciate it, or if someone has some extras they're looking to part with, let me know.