Just send lots of money, like most aviation ventures...:^)
1.5 million for this one -
http://www.platinumfighters.com/#!p-51d-dove-of-peace/cqt9
Or you can get a 70% scale, but still V-12 powered, replica for around 1/2 million
http://www.trade-a-plane.com/search?make=THUNDER+MUSTANG&model=THUNDER+MUSTANG&s-type=aircraft
Impressive.
When I visited the Roush Racing engine shop, they were building a V12 for Jack’s P-51 right along with the Nascar motors.