I just purchased the 2011 Spyder RT-s. After the first 100 miles I'm looking for information on any aftermarket drivers back rest. Corbin has one, but you have to buy a new complete seat and add the back rest option. I've not found any of the seat manufactures that makes or adds-on a drivers back rest. My dealer's parts people are calling BRP but not heard back yet. Anyone know of a seat or modifcation to the OEM seat for adding a drivers back rest?