Alas ... the pearl one isn't on the website right now ... but the rhinestone one is and it is the correct size. Here's a link to it.
So sorry, I've just done a bit of looking and I can't find a buckle exactly like the one I used.
And please don't think you have to use what I used. You might find something much better, or I bet some of you could make one! AND, there is always nice stuff on Etsy and Ebay, so check them out.
Next time, the sewing of the pleather belt and gauntlets, also I'll show you how I cut the rough jagged hems.