I'm here to inform y'all that bonnieclyde100's design, from the link above, works fine for the rear windows. Other than having shorter arms, the difference from the front regulator to the rear regulator is the gear is not centered to the arm. (15 teeth to one side and 20 to the other).
No matter as I made adjustments to the design. When repositioning the gear 90º I used the rivet holes as the reference. I also used a plasma cutter to make a tighter, nicer looking motor bracket. It made the whole thing go into the door easier as there isn't much room to get past the lower window stop. I also nicely cut out, reattached and reused the crank pilot/guide to the new motor bracket. I have full window travel.
I installed the regulators today and they work slick. Unfortunately I forgot to take pictures. I thought I took a couple pics after I painted the regulators but apparently not
When I go back to the shop I'll bring the camera so y'all can see how nicely the motorized regulators fit.