Yes, I'm a bit of a fan, and I agree it's a bit disappointing it wasn't in the game.
The mossie was a great plane and inspiration for many other great planes. And of course the B-25 was influenced by it, so that's got to be something, at least for me.
I liked this picture of a couple of Mitchell's flying with a mossie (probably at an airshow or something, though I'm not sure), like the comment says not sure you'll be seeing that again anytime soon!
http://www.flickr.com/photos/wurzels/3220002985/