Honestly, I really figure that most of the guys here could do a lot worse than to download the free copy of the catalog, and have a browse through it to see what ideas and solutions pop up as you see what is out there! They stock tubing, pipe, raw materials of known alloy and provenance, sheet goods ranging from alloy aluminum, to galvanized tin, and just a PILE of really useful hardware that might be just what a fella needs to solve a problem.
Aircraft Spruce Canada
www.aircraftspruce.ca
They stock pretty much all the materials and hardware needed to build and repair aircraft, but almost all of it, could be just what you may need for almost any other project too!