Honestly, I would just contact Ed Morad for a one, the stock ones suck, but the aftermarket ones are even worse. Ed's service can't be beat. Have you tried just greasing yours up, though?
I can't say on the coupe, but on my Regal I can do an entire regulator replacement in ~20 minutes start to finish, it's really pretty straight forward. After you do a few, it's even simpler.