Oh Yeah...A&L Sheetmetal at about 41st and Fox Street in Denver. Talk to Brian. They mostly do duct work, but i went in there once looking for some 18 gauge for patching the 40 and walked out with a 6 foot by 1.5 foot piece of nice cold-rolled steel for free! Then I went back last week to see if he could bend it up into rocker panel replacements at my dimentions and guess what...free again. Although I tipped him well of course, I am very impressed. I think I just lucked out with the free thing since he had that piece lying around collecting dust, but still he has been great.
They also sell sheet metal at DenCol (just north of I70 on Washington Street).
Sascha Steinway TLCA # 20217
1977 FJ40 "Ripper" (because it shreads!)
1988 FJ62 "Dino" OME, now in the hands of my daughter
2013 F-150 "Black Ops"