I was thinking of making my own belt and was looking for a simple buckle

I am looking for a 2 1/4" or 2 1/2" stainless or nickel plated steel single prong roller buckle

The largest "single prong" I can find is 2", anything larger is a "double prong" (not that there is anything wrong with the double prong - just not what I want)

I know they exist - I have seen them!!!

I cannot locate a source.

Anyone???