1973 Duster seat back release knob needed

I have a 73 Duster with the "deluxe" bench seat. (fold down center armrest). I need the knobs (left and right) that release the seatback latch for entry into the rear seat. I have one of the originals, and it is a slide on plastic knob, that is "chrome". I am finding a lot of knobs for adjusting the seat track but none for the seat back release. Does anybody have a good source for these? Thanks,