The heavy duty bumper may be a Bardon Bumper, it is very industrial looking. The telescopic mirrors are possibly an option from the dealership. The spotlight was most likely built by Unity. This could have been a optioned pick up from the dealer, but the parts could also be add ons by the previous owner(s)
If you have pictures, post them. I would be curious to see the camper shell. I know I have seen an original early fifties GM shell, but I could not find it tonight. I will look some more. Here's some old fords with vintage campers on them.
Vintage campers 
