Possible Sonic Screwdriver hack

I want to see if I can get a laser pointer that looks like the Sonic Screwdriver used by the current incarnation of The Doctor, the main character of Doctor Who. I was thinking of taking the Sonic Screwdriver flashlight (for non-fans reading this, I'm specifically referring to the one with the green bulb) at http://www.thinkgeek.com/interests/doctorwho/df8c/ and replace the bulb with a similarly-colored one from an actual laser pointer. What I want to know is whether or not this is possible and, if so, any tips on doing so successfully.