Summary

simple case for one of the generic USB Engraver pens from Amazon etc my model is an E108
holds all the parts that come with the engraver plus a couple of areas for a few other spare bits n bobs should you require them.
magnet holes are 10mm * 3mm so shouldnt be hard to get magnets to fit them.
im lazy so just used some good strong tape for a hinge.
i guess you could modify and add a hinge if you wish or even 3d print a hinge and glue on.