The best replacement for binder is notebook.

The best alternatives to binder are rated as following:
★★★★★  notebook
★★  folder
★  compression garment
★  komatsu
★  crypter
★  girdle
★  binder
★  accordion folder
★  dbus
★  notebook college
★  portfolio
  sports bra
  title policy
  lineslip
  certificate of insurance
  declaration page
  spiral notebook
  allsup
  insurance policy
  non-view binder
  dec page
  household notebook
  carb blocker
  trapper keeper

Your alternative for binder is not listed? Suggest!
Speaking about binder, one probably shouldn't forget about trapper keeper.

Other search terms related to binder and their ratings are:
★★★★★ trapper keeper
★★★★ binder
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binder
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