I actually need a set of those, so i can remove my stock plungers as I have 1990 belts in mine. I just refuse to buy from CJ pony parts (2 bad experiences the only two times I ordered).
OP, those parts only come with seatbelts, so you either need to find someone selling a cheap set of 79-89 seatbelts and use them for parts, or cut them out of a junkyard car