There is a Company in Aus, that I have purchased Fumoto valves from over the years that now do there own Valves.
They look really nice & seem to be an improvement over the Fumoto in some areas.
They also do a 9/16-18 threaded Valve (-6), 3/4-16 (-8), 7/8-14 (-10) also NPT sizes & others.
EZ Oil Drain Valve - The Easiest Oil Change
Cheers.