The best replacement for aer is apr.

The best alternatives to aer are rated as following:
★★★★★  apr
★★  fishman
★★  schertler
★★  acoustic image
★★  gross interest
★  gross pa
★  ercb
★  lowther
★  oer
  genz benz

Your alternative for aer is not listed? Suggest!
Speaking about aer, one probably shouldn't forget about hoodie allen.

Other search terms related to aer and their ratings are:
★★★★★ hoodie allen
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aer
apr
fishman