240Z seat belt buckle

For whatever reason, I find myself with only one seat belt buckle for my '71 Series 2. Been getting along with an old 3" racing belt on the driver side, but I'm now trying to get the car back to original. Photo attached. If anyone has the buckle or the whole belt (I have a contact qualified to make a replacement belt) I'd be happy to pay. I've placed an ad on the Parts Wanted page, but no responses yet.