Thanks for all the suggestions; but I think all of this is too much hassle, accommodation and potential danger for something I don't have to buy, nor will fit my needs.
Most importantly; my wife said she would never drive a vehicle with such a large blind spot during her commutes.
The dark "cargo area" is only 58" long 38" wide. My first impression is a coffin.
I drove an International Transtar II a lifetime a ago for an oil service company and had to park way out;...never back up alone....plan lane changes.