From the "I'm a poor ass" school of problem resolution: I keep a close eye on my local craigslist and freecycle. Every couple of weeks someone seems to always post a "Free scrapmetal" ad. You've got to be really quick because hundreds of scrappers are watching too but sometimes you get there first. Sometimes is crap, sometimes it's great stuff. Yesterday I answered one that said it was a fence and got several hundred feet of good useable square tubing in pretty good shape. It looks like this fence was up less than a year or so and it's hardly rusty. The larger stuff will probably be used to replace the rotted wood frame of my cab and the smaller stuff for all sorts of misc needs, like bracing the cab, the battery tray, behind the dash etc. The one I answered before that yeilded a yard full of mostly junk but mixed in were lots of 50s-70s car parts, which I have been selling off to fund my project (as much as I tried to "wish it true", I didn't find any vintage speed parts).