I think the original resin kit is availble through AIM, I did see it available in thier catelog. However, this cab is a bastard of that paticular body, when I got it in a parts auction it was very rough and appeared to be a 64 model. I changed the beltline in the door, added trim to the wheel well and added the running boards, door handles and fender mounted turn signals.
Its a lot better now than when i first got it. Occaisionaly I have seen one or two on ebay
I dunno, seems to me these "Haulers " as you term them were everywhere on the roads back I guess Twenty years ago to me . Now a days , when you see a "Early " shall we say Ford medium duty, it's been abandoned and in a thorn patch. Thanks for a look back into my not so distant past !
Driving, the most "Social " thing you'll ever do !