Are you going to disguise the auto gear stick as a manual?
If you can find some way of replacing the top of the stick with something less 'auto' looking but still capable of triggering the gear stop trigger so you don't slip from drive to neutral i would be very interested.
In fact, if you do make something, please make two and I will take the second one.
*I will try to dig out the exhaust cost for the other thread. It is a powerflow pipe