Help finding a 28mm gold or black buckle?

I was a backer of the Richard Tracey Brand HAMMER strap for Pebble Time, and I like the straps, but my PTS is going to be gold and I'd like the buckle to match. Does anyone know where I can get a 28mm gold or black watch buckle that would fit in a silicone strap? I can't find what I'm looking for and a lot of buckle suppliers stop at 26mm. Thanks in advance!

Here is the link to the band: http://www.richardtracybrand.com/products/hammer