Gerard seems to be one of the pets thats always on the AH, and if he becomes the single proc pet, I'm positive his stock will be kept up. Prices may jump a little, But he will be in stock.

I don't mind the idea of adding the Jug Pet thats procer to the NPC though... But i think Gerard really is the best bet. Cheap to make/buy, Can't-miss BPs, and I'm pretty sure he has some resistances to magic built in?