Guess it depends what else you can find local. I expect shipping would not be cheap, and if it shows up bent. :( Don't recall the gauges. I got a full sheet for body. He cut it in 3rds to fit in my wagon. also got smaller (few square feet) each of heavier for rockers and similar and heaviest was same as frame rails, brackets, etc. Think I gave a little over $100 for all (several years ago)
I had a 68 4dr Satty, Parts car for the RR resto I did. After I parted it out, and before I sent it away, I cut the entire roof center out of it. To keep for future sheetmetal repairs , using Ma Mopar Metal.