Found this via Make: and decided to modify it to look like a phaser:
http://blog.makezine.com/archive/2008/01/diy_wii_gun.html

Full instructions and the original template for this build can be found via:
http://chungdha.blogspot.com/2008/01/diy-wii-gun.html

Thanks Chung Dha Lam, and I hope you guys get a kick out of this! Please comment below if you have issues with the look or any suggestions.

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For some reason, the slideshow flash interface isn't dealing with the PDF properly. Here's a direct link to the document.
http://www.instructables.com/file/FER8VO1FBHXD6OZ/