If you want to do anything in the US id have thought a sensible option would be to buy a UK built phantom, ship it over, and use it to locate alternative donor parts, youve got early honda legends over there so thats the vast majority of the bits sorted.
The tricky bit would be modding the body so that it suits LHD, steering column, pedal box, heater etc.. all would have to switch to the opposite side.
This would probably be easiest by using parts from US donors rather than UK ones.
You just neeed someone in the US with a lot of will power and even more money
