i have a corbin classic solo that was mounted on my 2007 road king custom. the seat was modified by corbin with a 'nose job' to make the front thinner to allow for easier reach to the ground. seat was very comfortable, but unfortunately will not fit anything newer than 2007.
Corbin part number HD-RKF-4-CUS
asking $200.00 + shipping
comes with locking mechanism and 2 keys.