The best replacement for latch is flip flop.

The best alternatives to latch are rated as following:
★★★★★  flip flop
★★★★  seat belt
★★★  lock
★★★  isofix
★★  register
★★  seatbelt
★  seatbelt safer
★  buffer
★  seat belt which is safer
★  touch
★  middle seat
  lock sql server
  momentary
  flop
  spring latch
  no latch
  d flip flop
  flip-flop
  barrier
  seat belts

Your alternative for latch is not listed? Suggest!
Speaking about latch, one probably shouldn't forget about booster seat.

Other search terms related to latch and their ratings are:
★★★★★ booster seat
★★★★ key lock
★★ handle
hook
You have in mind a companion for latch and it is not yet here? Propose!



Google Trends

Scale is based on the average worldwide traffic of latch in all years. Click on graph for more.
latch
flip flop
seat belt