Rear pickup replacement

[Twincam]

Currently using two nordstrand big singles and an east preamp. I'm not getting the sound I want from the rear pickup hard to explain what I'm looking for which is no help really. I play with flats.
I'm thinking of trying a new rear pu any ideas I want to run it active but on the rare occasion I switch to passive.

[PlungerModerno]

Are you sticking with the big single size? By which I mean do you want a direct replacement with no large gaps or routing needed?
Unfortunately that means a lot less options than say a regular J bridge pup. Still a good few options if I'm not mistaken.

I'd be looking at something less overwound or "hot" I've never had a set of big singles as they seem on the hot side - The opposite of my current taste.