RPF PREMIUM MEMBER
These are $295 + shipping.
I still have some of these, and if they aren't currently listed in my etsy shop (BigEffectProps on Etsy) pm me and I can re-list them.
At the moment I am not selling them with the buckle attached, so you'll need to get the hardware yourself and do that (the buckle is included, just not attached to the straps). The hardware is "flat cap rivets" in 8mm size, available on etsy and elsewhere.
A couple pics (more on page 9)