Wow, the owner of such desirable cars showing up here

.
Forza 3 only has a closed 330 P4. There are very few open cars in Forza 3. Cars like the Ferrari California are shown closed.
There's a livery editor in the game, so you should be able to make whatever livery you want.
Maybe I'll look at the huge Forza credits if I can find you.
Edit:
Yes, you are listed under "special thanks to the car community that helped make this possible".
Didn't you get at least a copy of the game, a special one signed by the devs would be appropriate.
@jjaisli
Sorry to everyone that had problems with me yesterday.
There is a big timing / sync issue in SCC. It shows up from the beginning when cars seem to be released early, after the finish where the race result is often different for every player.
And of course in game:
Yesterday Arvore thought I would have pushed him out sometimes but from my point of view it was just the opposite: He hit me hard from behind not only once so that I went off track.
Let's hope the updated netcode in the upcoming patch solves some problems.