It's not my "thing" at all @johnh23 but I know of several bodybuilders who will perform on cam, do private shows and more. Bodybuilders have large expenses to meet and some are relaxed about male/male action.
You just have to be discreet, polite and patient in approaching them. Obviously it helps if you are rather generous. As I say, it's not my "thing" - for some unrelated reason, the names Liam Jolley and Jase Dean come to mind - but others who share your interest may be better placed to advise you.