Like you, in the past I have found less things available for the '46 and older Chevy trucks than for the '47-'54 trucks.
However, I am looking at a Fat Man ad now. It has a list of all the kits they have available. On the list it has one that says "'34-'87 Chevy Trucks".
You might want to give them a call. (704-545-0369)
Or here's a link to their website.
fatman P.S. have you found a restoration shop yet?