Actually just got back from Home Depot, and found what I think will work perfectly. It was in the electrical department and normally used to hide wires. It has the unistrut type channel, plus the piece that slides inside, all in one package, and only 7.68. I just need to cut some 6 inch lengths, drill a few holes, and should be ready to mount.
http://www.homedepot.ca/product/wire...l-ivory/911637
Thanks, everyone for the great ideas.