just found these which seems to get a diff mounting bracket BUT the rest of assembly seems to be the same, sooo, maybe springs are the same:

https://www.ebay.com/itm/1972-76-Mopar-A-Body-Black-Seat-Belt-Clips-72-73-74-75-Dart-Demon-Duster/264215907268?hash=item3d847ecbc4:g:Ie8AAOSwXY5ZTLPM

With a Charger born in Chrysler assembly plant in Valencia, Venezuela