Used a bog standard camera mount from Thingiverse, it's in raspberrypi/Anycubic_I3_Mega_Raspberry_Pi_Camera_Mount
I printed a side case mount. This is a top from https://www.thingiverse.com/thing:3723561, modified with display/camera/gpio holes using the scripts, and the base/mounting brackets from https://www.thingiverse.com/thing:4462741 - the top fits as the latter repo is a remix of the former.