Where can I buy a green laser and line lens?

[solarama]

Hello - I'm interested in using a laser with line lens (to make a flat beam) and would appreciate any advice. The goal is to use it with a fog machine and make videos for art work (I don't want to burn anything, including the line lens). I currently have a 100mw 532nm laser pointer with no line lens. Should I get a higher power (.5W, 1W)? A different color? Where is a good place to find both the laser and line lens? Thanks so much! -Sol