Need help for locating a new Generator box

I sometimes carry my Firman 2000W genny on a HF cargo carrier mounted to my truck trailer hitch and other times carry it in the bed and I have seen similar cargo carriers mounted behind TT. They may have a hitch on the trailer or bolt the carrier to the bumper. I have a thick Honda cover for my Firman and then wrap it in large black garbage bag if suspect wet conditions. Carry the accessories in a small rubber mate container inside the camper shell.