If you were fortunate enough to find the window regualtors with motors, that is a good start. Are you talking about the brass pieces that attach to the bottom of the windows where the holes are ? Or about the steel vertical guides, where the equipment goes up and down ?
Have you tried ebay ?
I replaced my window regulators last year. I accumulated some extra brass pieces, and think I have some of those steel guides too.
Also, the rubber circles that fit onto the brass pieces, that keep the window from wobbling are easy to make yourself.
Like your handle....just had a baked potato last night.