Find a clean one in a junkyard and cut the roof off at the bottom of the pillars and swap it over, or swap a whole body over.
Could try to re shape it with a highlift jack, or use one of these..
Portable Hydraulic Body Puller Kit
Doesn't look too bad. Got any better pictures?
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92 ExtraCab on 38s: built for go, not for show
88 4runner: Solid axle, doubler, fun stuff
IG: rattlewagon
Its all about the parts you break, and the friends you make.