How about this...http://www.cycle-tow.com/
Or maybe something like this...http://www.cruiserlift.com/swivelwheel.html
That second one is kinda crazy but the first one would work well.
'06 R12GSA/Hack & '10 R12GSA
An armed society is a polite society. Manners are good when one may have to back up his acts with his life. Robert A. Heinlein