I can check with my Pal “The seatbelt source” but I can’t promise you anything, give me a couple of days and I try to locate the car model
You see I´m not sure myself . I had a couple of these laying sins long and when i started to do something about the 3 point seat belt projet, these turned out to fit just perfect . We have a little 3 year old girl and in Sweden children is travellingin cars looking backwards until they weight is about 30 lbs , and that wasn’t possible with my wife’s Firebird from the start
I think I bought these from a swap meet long time ago, They are from a Swedish company “KLIPPAN” and they make seatbelts to many car both Swedish and non Swedish cars . But I can give you an advice. Take a look at a car junk yard there you can see plenty of seatbelt I´m sure there is several small compact cars with nice small seatbelt solution . I was trying with another pair of belts to, think it was from Audi 100 -88 -91 something or perhaps VW passat but they were just a little bit to large to fit properly .
I have a friend with a 68 convertible and he liked my seatbelt solution so he did almost the same but he put the house mechanism under the armrest panel, showing only the belt coming up between the armrest panel and the rear ash well panel and that looks more like stock mounted than my solution . But it works the same
I add some of my picture showing Seatbelts in action
Hope it´ll work out .
Tommy