p51d

im trying to find information on the p51 and i cant find info on when the d20 or d30 entered service do anyone know anything about it (sorry if its a strange question)

This aircraft was flown by Col. Dean Elmer Hess. He served in ww2 and when korean war has begun, he lead korean's first fighter squadron 'Bout-One'. His nose art '信念의 鳥人' means 'I fly by faith'.

I am wanting to acquire plans and schematics for a P51 D mustang. I am not to educated im how to acquire them if even possible, id greatly appreciate any help