I think I recall the reason Van's didn't make manual flaps available on the -9/9A is the length of the flaps and the fact that they are slotted type (Back and down in deployement) means the "average person" won't have the strength to deploy them.
Thanks Bill, I appreciate your time. I decided not to do it anyway, I don't think my fat body would clear the flap handle anyway! (Although Tom @ Van's said it could be done fairly easy with RV-6 parts)