Hi Ray! I've heard of people adding hand brakes to the right side but not sure how it would work on the left side with the shifter. I know a lady has moved the throttle to be foot operated but that was on an RS. I'm not sure if it can be done with the throttle by wire on an RT.
If you find someone that was willing to look into making this change and they want to take a closer look at an RT send me a PM. I will try to help you out if I can.