Decorative Buckles

[spykitten.livejournal.com]

I'm trying to buy some larger metal square buckles, the type on the toes of men's shoes in a pirate or buccaneer costume, and also at the bottom of the knickers that a male buccaneer or pirate would wear. (Guess what sort of costume I'm working on!)
I've checked the faq, googled various combos, and bizarrely enough I can't find anything! I know there must be some great accessory store or buckle seller on the web that's eluding me. Any advice?

These are pretty small and poor examples, but you can see the buckles on the shoes here and also here.

Many thanks, craftgrrls & boys!