Started on removing the bed and got the measurements for the side rail "c" channel supports. They are 1" x 2-5/8" x 1" about 5 feet long and measure out to be 14 gauge thick. I'll get these made by a local sheet metal shop ho is conveniently owned by a car nut for $50 for the pair. I'll have to get some rectangular tubing for the rear support which requires about 1" x 4" tubing also 5 feet long. Also made my tank for de-rusting the doors in 50/50 vinegar water solution. The tank does half a door at a time to save on vinegar. I made it out of 2 x 8's and some scrap plywood finished outer dimensions are 36 wide by 30 high by 9" thick. Caulked all the inside seams and put in a cheap bed mattress cover for an additional liner. This used 10 gallons of vinegar and 10 gallons of water to fill to about 4" below the top of the tank. Had a couple of leaks through the knots so put a bucket underneath the tank to collect the vinegar which seeped out. My earlier test showed that 30 hours is about right for this process. Couple of tank photos attached.