Hi link doesn't openMotoParts Inc in Alberta seems to have the Iron John valve with electrical switch:
Their ebayisting:
https://i.ebayimg.com/images/g/wnAAAOSwpWBazWId/s-l500.jpg
I'm to cheap to spend that much on such a simple device so I cobbled one together from a stainless ball valve from a local hardware store and a Normally Open microswitch. the valve operating lever closes the switch only when turned to valve open position. Switch is wired in series to the white line to the ignition switch.
View attachment 9079
Works great.
Cost about $15 total.
I've edited original link, but here it is again:Hi link doesn't open