I'm already part of the club, but Tuesday evening I installed a pair of pickups that are replications of the early hi-gains and made by Classic Amplification. These have rivets for pole pieces like those produced by Ric, and fewer windings (lower DCR) compared to the 'modern' hi-gains. I had been underwhelmed with the highs/mids & general lack of 'snarl' from my '10 4003 - these
transformed my bass. I already posted this in the pickups section but I wanted to share with fellow Ric players:
Classic Amp's neck pickup will fit in the stock Ric cover, but I opted for the aftermarket cover they offer which brings the pickup closer to the strings.