The best replacement for 3.6 is 3.8.

The best alternatives to 3.6 are rated as following:
★★★★★  3.8
★★★★★  6mm lens
★★★  4.0
★★★  2.5 outback
★★★  4.0 jeep
★★  2.5 subaru outback
★★  3.8 jeep
★★  2.5
★★  2.8
★  4.4 range rover
★  3.8 jk
★  3.8 wrangler
★  ie8
★  1.7
  5.7 ram
  4.2 q7
  2.0t
  3.8 jeep engine
  3.9 impala
  2.0 t
  3.5
  3.8 engine

Your alternative for 3.6 is not listed? Suggest!
Speaking about 3.6, one probably shouldn't forget about ics.

Other search terms related to 3.6 and their ratings are:
★★★★★ ics
★ flip top cover
You have in mind a companion for 3.6 and it is not yet here? Propose!



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3.6
3.8
6mm lens