"Red Dog XII" is my sixth D so I'm cringing at the idea of doing another. HTC tries to display the work of as may skinners as possible so I may have already exceeded my limit on D's. (Maybe Skuzzy could jump in here and give a few words on the subject.)
My resources are limited to whatever I can find on the web. So if you want to find a P-51B that will go with Citabria's "Big Beautiful Doll" from the 78th FG, or find the sister of any other D that has been done and no one as committed to doing the B (332nd, 361st, and 479th for example), I'll consider doing it. I could even be talked into doing a pair (a B and D) but I think we would be pushing our luck to get the D in the game.
I think having a B and D in the same group markings from the same time period is a good idea. Maybe we can get things headed in that direction. Keep the faith dude.