How about one of these?
A buddy had one that you could watch the highway go by through the rear seat footwells. He took it four-wheeling in a meadow once, got stuck, and after I towed him out we discovered the car had actually bent downward in the middle somehow. So we positioned a log or the curb or something in the middle and jumped up and down on both bumpers simultaneously. It worked mostly.
'7? Benelli 650S, '80 BMW R100 RS, '93 Ducati 900 SS, '07 KTM 990 Adventure