I realized the other day that the black piece behind the white tab has broken off one of my pivots (see the last picture for the black piece I'm referring to). This allows the binding dildo piece and arms to slide ~1cm in the direction of the tip and tail of the ski. I haven't noticed any problems with prereleasing, but then again, I've only been skiing a small hike park. It seems quite sketchy and I'd like to fix it.
My question: I have a few old FKS heel pieces. Is there any way I could take this piece(s) off them and replace this? Thank you!!