This is a dc motor 360-3045 support (motor diameter: 27.5mm motor lenght: 35mm) that I created from Fusion 360. I know that maybe is not one of the best support, but I'm not very good in 3d drawing...

You will need also 2 screws M2.5 (not self-tapping) and also 4 M3 screws with 4 washers (with 3mm hole) and 4 M3 screw nuts, I think that not self-locking is better due to the small space (there are 4 adjustable holes on the bottom, to fix the support through the M3 screws on other things).

I hope you will enjoi it!
It's an old model, so is not 100% optimized