1974 Eldorado window regulator help

Are there any places that sell the driver side window regulator? The motor seems to be ok but the window will go down and up but will not go all the way up. It will stop about 1inch from the top and make a clicking noise. I think the gear might be stripped in that location. I can pull the window up the last inch but would like to fix. I tried ebay and none there. Any after market places. It might be hard to find in a salvage yard because of the year?

Also is this hard to change in these cars? I'm doing this for a friend?

thanks

Try he advertisers for Cadillac parts in Hemmings news. Not too hard to do, just be careful of the very strong spring on the regulator if I remember correctly.