window regulator '73

Does anyone know where or if "new" regulators can be purchased for my poor '73. Or, is it possible to use a different year regulator for the '73? Thanks for any help you may have.

The 73-77 should be the same also the Monte Carlo is supose to be a replacement. I order 2 used ones for my 77 form a Auto Recycler to convert it to power. Thats how I found out about the Monte Carlos. Have yet to install.