It would not be a horrible job to make extensions for the stake pocket. This test took about 10 minutes:
Next step would be to refine the dimensions and make second prototype.
The far side in 2nd picture kinked a bit as I did not get the side bent tangent to the bead edge and the beads are slightly too close to each other. It also needs longer sides welded on to make a finished part.
A couple hours would probably turn out passable curved extensions.
This was 21 gauge, it would be harder to make this out of 18 for a structural repair.
If you are into this sort of thing the tools are not expensive.....
I used a cheap bead roller and 1/2" beading die for two parallel beads in a flat sheet(Princess auto, jegs, eastwood etc under $150 on sale)
A bench mountable sheet metal brake to bend the sides down, (the cheap sort you use c Clamps to clamp a flat plate down. $50)
A shrinker to shrink the flanged edge and give it some curve. ($150 at harbour freight)
some kind of welder is also needed