Power seat repair 72 Monte Carlo

I am a novice and first time poster so please bear with me. The power seat on my 1972 Monte Carlo has a cylinder with metal shims or gear teeth that a metal shaft spins to make the seat go forward and back. The shims are stripped on the passenger side cylinder. Is there a way to repair or replace the cylinder or shims? If not, any suggestions on how to convert to a more modern set up?