does anyone make these? i have 3 in various states of repair. i did find a repair kit that i can get....that may fix the problem that just occurred becoming stripped. but i wonder what the spring loaded rollers that attach to the window channel and arm are called and if they are available? i can probably get kit that will fix the small gear that just stripped. and if i could find these spring rollers i maybe able to make a good regulator. or maybe better buy a good used one or after market one. any help?