Well, I've already planned on making Harry Dresden, Mouse, Mister and Bob and plopping them down in San Myshuno. (Mouse is a Tibetan Mastiff, Mister is a mixed breed domestic cat I've always pictured as having a strong Maine Coon cat vibe, and Bob is a Romance Novel loving spirit of Intellect bound into a skull.) Not a duo, true, but only Bob - and maybe Mouse - really qualifies as a familiar.
Beyond that, I don't think I'll make any other media based Spellcasters. I generally prefer to make my own.