The best replacement for mirrors is lenses.

The best alternatives to mirrors are rated as following:
★★★★★  lenses
★★★  medicine cabinets
★★  cameras
★★  mylar
★★  photos
★  lasers
★  kool vue mirrors
  f150 mirrors
  non-heated mirrors
  photographs
  walls

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

Other search terms related to mirrors and their ratings are:
★★★★★ doors
★★ kiefer sutherland
★ sconces
★ lighting
★ wood frames
You have in mind a companion for mirrors and it is not yet here? Propose!



Google Trends

Scale is based on the average worldwide traffic of mirrors in all years. Click on graph for more.
mirrors
lenses
medicine cabinets