Re: P-90 Neck And Tele Bridge...?
For the P90, the Vintage Soapbar neck model should do the trick. The bridge is a little trickier because all of Seymour's Tele bridges appear to be either 7.6k and below or 14k and above.
My guess would be the Vintage Broadcaster Lead because it has flatpoles that will allow you to get the pu a little closer to the strings for more beef and therefore more dirt -- plus you might get lucky and get an overwound one. Omboy gave me one that's about 8.4k.