I used this from Home Depot to make up my mounting railings for my Radion LEDs.
http://www.homedepot.ca/product/wire...l-ivory/911637
Here's the thread describing how I installed them. All you need is a hacksaw and a file to smooth the edges, and a drill to make a few holes.
http://www.canreef.com/vbulletin/sho...t=81535&page=2
I recently did another installation with my new Gen2 Radions, using the same cheap HD part.