Shifter

Hi guys. Have a bunch of work being done on my Cuda. Switching to 15 inch, discs up front, heads,rollers, whole wack of stuff. I am an amputee, missing my left arm, no prosthesis. I am in search of an aftermarket shifter, (automatic), something I can reach over to quickly, grab a gear and get my hand back on the wheel ASAP. Just wondering if there is anyone else in my situation or any suggestions as to what would work good for me. I have not searched much yet to see what might be best.
Thanks
Sparky