Hello.
There are plenty of Coherent DPSS lasers out there on ebay.
For example this one doughnut
http://cgi.ebay.com/Coherent-Donut-L...d=p3286.c0.m14 
What other parts are required to get one of those diodes working, cutting/engraving that is.
Another cuestion, the wattage that is specified is the Volt x Amp that the unit consumes, not the actual laser power, right?
Konstantin.