Why? what's wrong with the manual version that's already available? No reserve? jamming? (which can be rectified) The manual screw tap is actually a good design just needs a little fettling.
I think you could use any 5/16 outlet tap personally but you would need an adaptor to go from the 5/16 tap outlet to the 12mm pump inlet.
I have and like the manual one. Where I ride, often gas stations are few and far between.
Thanksgiving I headed for a multistate ride. Thinking gas stations might be closed (they were) I added some gas I had for lawn tractor.
Now my odometer wasn't going to let me know when I was getting close to empty.
Not sure how long after low fuel light came on before sputter---stop.
Brought a camp stove container, but rather have a reserve option.
No big deal, just thought someone might make a on/off/reserve replacement