K5ING
MegaMiler
This is what Roadster 2.5 has. This this would work although it does take more time then a stalk.
I don't know much about the roadsters and wasn't aware of this. Thanks.
Another solution may be to have "creep mode" engage when the car is put into reverse. At least the driver would feel it begin to back up when they take their foot off of the brake. I know that many choose not to have it on for normal driving, but is there any reason not to want it on when reversing?