Well, McMaster Carr doesn't have the profile I posted above, but they have some standard aluminum channels in different proportions. I'm pretty sure I can find this stuff locally as well. I've come up with a neat design (so far it's sitting in my head) for making a very nice enclosure using mutiple pieces of channel sandwiched on top of each other. Now I just have to figure out when I'll have enought time to start and finish the project.

Bruno