I have a lot of scanners on the production line I manage as an engineer. Most of them are Honeywell's 1950GHD which come with quite flimsy holders (oversized). I designed something that is a bit more tight and can be easily attached to extruded aluminium profiles or used with the original arms.

I've printed this in ABS (on the pictures) and tried PLA. Prints well.

Holes are for M4 Hex Socket Countersinks. Can be mounted with extruded profiles running horisontally and vertically.

Check Raw Model Files for version without the front screw holes.