BTW.. I love how this turbo question is asked every 2 days around here. I think, "Can I use the turbo off of a X on my escort" is some sort of built-in n0ob alert that is fundamental to the social structure of a car-site and is based in the most primal essence of ecology on the intarweb.
I'm with slapyo on this one. A VJ11 is your best bet, its what Mazda used to turbo the bp series in teh first place, however you could buy a T3/T4, have a bit more lag, but a TON more power... I got owned by a turbo'd Miata with the 1.6L Variant of the BP series motor which had a T3/T4 on it.
One question tho, why is this in the tech and repair? we have engine tuning and forced induction forums for these types of questions.