[sanddrag]

I'm not sure how fancy you want to get but you can make some inexpensive, very nice looking and pretty darn strong frames with 3/16" diameter brass tubing, a little bit of brass plate (for mounting locations), a dremel tool, some solder, a high wattage soldering iron, and some time and patience. Here's one I did: http://www.chiefdelphi.com/forums/pi...le&picid=11732

Here's another example: http://www.truckworld.com/Monster-Tr...tubeframe.html

Just be sure to clean the oxidation with something like 400 grit sandpaper just before you solder it. Also, notching the tubes with a dremel so they fit together is a really good idea.

I recommend building the flat (2d) sections on a pice of board that you can put push pins (T pins) into to hold the pieces in place while you solder one side, then flip it over and re-pin it and solder the other side. The technique of laying out the parts over the plan and holding them in place with pins is somewhat similar to building parts of a balsa wood model airplane or a wood bridge.