Re: New Gibson pickup most like a 1964 PAT
Steve Lukather related how he once met George and told George how he thought Taxman was his greatest solo. George replied, "Yeah, Paul did that." Turns out it was played by Paul on Paul's Esquire.
Hard to say what one pickup in a Gibson would make George's Revolver sound when you consider multiple guitars were in the mix on that album. Stratocasters were used, Epiphone Casinos were used, Gretschs were used - and there's no guarantee who played which parts. Even George Martins recording notes from the time have been thought to contain possible errors; partly given to the pace of work and amount of re-recording/overdubbing.
I think if you can get more specific about a particular guitar part, it might be possible to suggest a recent model guitar, pickup and amp combination that would make that sound.
In the meantime, what I would suggest is either a Seth or an Antiquity, since that is the closest to what would have been in an SG at that time.