Mount for Gear Motor
This is mostly an explanation of how to quickly make a custom mounting bracket for a complicated part.
If you want to mount this motor: http://www.sciplus.com/p/CAR-SEAT-312VDC-GEAR-MOTOR_49248, use these files.
Examine the original motor and all the curved/odd shapes look challenging. I just pushed the motor into some clay (Sculpey). Next I scanned the clay model. At Tinkercad.com, I combined the scanned clay base with a designed flat piece (plate with four holes). Then, using the Tinkercad "hole" tool, I made a couple of holes in the scanned piece where I could secure tie wraps.
In just a few minutes design time (and a few hours print time), I created a secure mount and can continue working on my project.