V-12 Timing Rotor

[jkeery]

Can anyone steer me to a source for accurate reproductions of Timing Rotors for my '74 V-12 OTS?. I've not had luck with what I've found so far. The parts book shows JS.398 while the Lucas number is LU54423392 and from what I've learned, timing rotors for the later V12's create a gap difference that leads to rough idle and hard starts. I found a used but worn Lucas original that cures those issues but the plastic is almost worn through to the ferrite rods, so its not a long term fix. As always, thanks in advance for any help received.