Building a case for homemade laserpointer

Hello,

I am attempting to build a 400mw red Laser from a DVD Writer and have got the circuit building done, my Module is being shipped right now and I need a case. I have searched the internet for Ideas, but they all use flashlights, but i am using a LM317 constant power source on a piece of stripboard, so its probably not gonna fit in there. thanks for answers