The best replacement for pickups is passive.

The best alternatives to pickups are rated as following:
★★★★★  passive
★★★★  humbuckers
★★★★  passive pickups
★★  active pickups
★★  alnico
★★  pick-ups
★  texas specials
★  seymour duncan
★  new guitar
★  uncovered
★  single coil
★  p90
★  passive bass
★  sadowsky pickups
  gibson
  chevy pickups
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  new amp
  single coil pickups
  p-90 s
  humbucker
  bartolini
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  p90s
  ceramic
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  vintage
  norstrand pickups

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Speaking about pickups, one probably shouldn't forget about pickguard.

Other search terms related to pickups and their ratings are:
★★★★★ pickguard
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pickups
passive
humbuckers