Picked this laser up several months ago, finally got around to making a magnetic mount for it.
Drew up a semi circular clamp (inspired by @Luke) and three mounting plates in F360. Printed the clamp in PETG, 100% infill, plates also PETG, 30% infill. 12 6mm magnets for the laser and 8 for the power supply.
Will share the files after I clean them up a bit.