You can find the B-model here, I've done about 25 paints for it so far, which are all available on OZx
I have tried the Flight1 P-51D, but deleted it, I did not like it at all. Wrong nose, wrong tail, ugly textures. A nightmare to paint too. I am not aware of any repaints for it, and there is a reason for that.
The warbirdsim P-51B is much much better, especially since they've overcome some initial problems and cut the price by a substantial amount.
It is also a dream to paint, with a fantastic paintkit.
Mind you, that is just my opinion, other people may think completely differently.
War