That sucks. Happens to everyone tho. I had an agreement to buy a Miata for a smoking too good to be true price (divorce deal. Woman just wanted it gone.) On my drive to get it she calls and told me it was sold. Pulled the rug out indeed.
Maybe it will work out yet.
It's not clear to me which uses British and which uses NPT but in any event they sell adapters cheap enough for this exact purpose. Quick, cheap, foolproof. Just gotta buy the correct one.
https://www.amazon.com/GlowShift-Female-Sensor-Adapter-Reducer/dp/B00NWZ3TUI