Not sure if anyone has seen these or not, so I'll share. I received a news letter from CNI today, on that letter was news of their new 514nM modules advertised as Argon replacements. Power is fairly limited at this time.

They look cool, anyone going to try one out?

http://www.cnilaser.com/green_laser514.htm

They also list a few 488nM modules.

http://www.cnilaser.com/blue_laser488.htm