Sport Seat seat belt pics needed

[911 tweaks]

I have a pair of single lock sport seats that will be either going in a 73' or 72' coupe and I was wondering what "seat belt receivers" I need for them...?? Can someone please post some pics of what I will need & if anyone has any for sale, please let me know...I am looking for ones that I think bolt to the inside pivot bolt for the seat back, right...??

Also, is there a difference in what this seat belt receiver would be if it was in a 72' or 73' yr car...??

I would place a wtb in the classifieds but I don't know what I need looks like so I am starting here... :-)

Thx,
Bob