Just found an easy and affordable way to quickly make a pretty good motor mount.
these fit very well onto trucks up to 16,5mm and clamp super hard. with two of these you can make a very strong and adaptable mount to fix a metal plate to that holds the motor. because they are round clamps you can easily alter the tilt before clamping them together.
I don’t have metal plate on hand, so I made rough test fitting with some scrapwood.
I’m making a mounting plate for the motor atm but even with the wood it looked very promising.