Dale,
I'm working on a paddle shift system for manual transmissions. It should cost $400-500 plus the cost of the paddles (I'm using Mitsubishi Lancer paddles, cheap on ebay). (I'm a PhD robotics guy, so this is the kind of thing I design/ build all the time). The first version uses a manually operated clutch, but eventually that will be upgraded include AI based clutch automation (I haven't priced this part of the system yet, but can be added anytime after).
Unfortunately, I'm working on 100 projects simultaneously, so it's not ready yet. I'll be happy to share the system design with you once I have the prototype finished. I will be focusing on it once I get the car painted (sometime in the very near future. Should be priming within two weeks).
Let me know if you are interested in a system like this.
Cheers,
Neil