Cabs and beds are out there even frames can be had if you’re willing to do the work it’s not as bad as it sounds really. I built a 88 4X4 starting with a good frame they are not extremely complicated and pretty universal parts wise. Do the regular internet searches then start cold calling junk yards you might find what you need.

I called around to many yards in MO a few weeks ago on a parts search nothing then I called one back and hit gold on a truck bed so you never know what the next call might bring.

Good Luck