Have you considered techniques from long ago?
Like this blade tube chassis I put in an old Flyte? That’s a CFX I had lying around but it works for any board.
You can also cut out a seltzer bottle to make an electronics shield, and use a piece of tubing to hold the PCB held in place with a set screw.
Any saber can be lit, if you just don’t give a …uh get caught up in the aesthetics of the internals.