I've seen the same bedbugger twice that has what looks like a drom box
with a motorcycle in it and had a lift on it like the nascar haulers do.
Very nice setup shopbuilt looks like with lots of chrome.
aaaaaauuuuuummmmm chrome quoting Homer Simpson

I used to bungie my bike to the back, but heres a thought. Try designing your own and make sure you get a patent on it so you could have it manufactured and marketed. You can goto a company that already builds bike racks and do a licensing agreement with them. Just DON'T forget the patent. Ace Frehley created a strap with a lightening bolt on it and when Gene Simmons told him to get it copyrighted, he blew it off.....someone else copyrighted it and he lost out on alot of easy money.