While it's unclear exactly how these things attach to a belt from these pictures, I can only say you'll definitely stand out in the crowd with R2-D2, Boba Fett or a Stormtrooper sitting right above your fly.
All three buckles are available over at the Star Wars shop, and sell for $25.99 (USD) each.
You know what? I don't wear belts. It's true, my girth alone is enough to keep my pants up AND effectively keep my penis hidden from view. And that's why you're here. *dropping trou* So, give it to me straight -- is it still there or not? Gotdamnit.
star wars belt buckles: may your shorts be with you [technabob]