Well since I have some fellow Fender P5 players here, let me be the first to ask a few questions:
1) Is anyone else using chromes? And if so, how is the action on the B-String? I can't seem to get mine low enough, even after shimming the neck with a business card.
2) Will a jazz bass pickup cover fit over the Pbass pickup?
It really helps to use a tapered B string. I like Chromes and have them on a couple of my other basses. I swear by Sadowsky flats on my P5. Rodger knows what works on a 34" 5er.
I do not think you will get bridge or pick up covers on a 5er without making them yourself.

