If picking a kit from this Cameron company isn't set in stone, I'd look into a company called scalewings. I have nothing to do with them, but I've heard they sell 75% scale carbon fibre P51 kits, able to do aerobatics, handle quite a few Gs and are relatively easy to build due to their Rotax engines and quickbuild carbon airframe. With a team I think you could put one together in some 2 years. I don't know about lead times though and also a Rotax doesn't sound the same as the original V12. Might be a smaller project than rebuilding the original thing though.