Get a sandbag and mallet and fab your own. There's not that much compound curvature there, and it would be pretty easy to match with just a bit of forming. Or you could check around to see if someone has a 47 cab that could cut a chunk out of for you. I have a BTS (beat-to-.....) right front fender that I hung on to as material for patches. I would bet that a piece of that would be pretty close to matching the curvature at the fuel opening.


Kevin
1951 Chevy 3100 work truck
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1929 Ford pickup restored from the ground up. | 1929 Ford Special Coupe (First car)
Busting rust since the mid-60's
If you're smart enough to take it apart, you darn well better be smart enough to put it back together.