Things that would make me go all Fry "take my money":
If you could make a P30, with a G19/P2000 length grip, took G19 mags but still with the paddle release, had a deep optics cut so you didn't need a front sight that looks like an SSBM conning tower, and had a trigger from like a Langdon-tuned 92... man that would be a sweet gun.