Ray- I don't think there is any 1/4 jet jocks manufactured at present, I guess the demand would be pretty low?
I think there are a few custom pilot makers eg 'Pilots by Dianne' that could customize a regular 1/4 scale sport pilot. I am not sure about this though just speculating. Sorry I cant offer a url, but an 'Advanced Search' here on RCU for 'Pilots by Dianne' is a good start...
I just have got to ask Ray, what is the jet model you have in mind for such a big guy...any pics?
Cheers-