Report Power Window Failure in 1984-91 Avanti Posted November 15, 2016 · Edited November 15, 2016 by avantidavid not sure if you got a reply but I sent mine to a company called Window Motor World inc 1-800-252-2649 windowmotorworld.net I had my mechanic take my whole window regulator out and I shipped it to them. I got my window regulator back with a new motor, thicker cables, new pulleys, cleaned it all up and guarantee it for 1 year. They turned it around in a few days. Save your time and energy in trying to find out what Avanti Motors used and have these guys do it. You will get back a complete widow regulator just like new.