Tokina 17mm 3.5 PK mount aperture ring

[sammo]

I am restoring a Tokina from two lenses. One looks new with cracked front element in FD (sucks because I shoot canon) and the other is really beaten up in Pk mount with lots missing parts. I managed to restore a beautiful lens in PK mount, just the problem I have is that the aperture ring from the FD lens doesn't fit on PK. It is probably unlikely that somebody has it, but still...would be really great to get an aperture ring that fits (maybe from some other f3.5-16 tokina?) the PK mount 17mm.