Seat belt identification

[bricol]

I'm looking for a couple of seatbelt latches/receivers/lock similar to the ones pictured. They came from a later 70's/early 80's VW Derby.
I've seen similar in something else - but can't remember what. Trying to widen the field to find some, so if anyone knows . . .?

 

[Scalarocco]

Lada Riva, circa 1983.

 

[Turbo]

I think a VW Derby was the saloon version of a polo so that's where I would start.

 

[octo0072000]

Britax name comes to mind but not seen any like that for years

 

[bricol]

Thanks all - think I'm probably on to a loser. I found the other set pretty easily 20 yr ago - but I guess anything that used them is now either a well looked after classic, or tin cans . . .