Do you have a photo of your front buckles? They made 3 different ones for 72 in case your trying to match.
The thing is that even the fronts are missing, but got new ones from CARS with the blue GM logo. Just missing the rears now. Shoulder belt is there and in black, will take closer photos later today. My car originally came with a bench seat. Someone at some point converted it to buckets and didn’t finish the job. Not even the “fasten seat belt” light on the fuel gauge works.
Here's the photo of the missing rear belts. The retractable passenger side is there but the rest are missing.
I have a set of rears in black. Mine do not have the retractors like you show.in your picture. I was not planning on breaking up the set. It looks like you need three female belts and one male belt. I'll give you first dibs (posting in For Sale)
Cool to know, I have a pair of the black retractables in a Cutlass. I'll grab a few pics in a couple of hours.