The best replacement for ipf is hella.

The best alternatives to ipf are rated as following:
★★★★★  hella
★★★★  lightforce
★★★  pf
★★  ipfw
★  usapl
★  uip
★  piaa
★  wpc
  copd
  bluefin

Your alternative for ipf is not listed? Suggest!
Speaking about ipf, one probably shouldn't forget about lung transplants.

Other search terms related to ipf and their ratings are:
★★★★★ lung transplants
You have in mind a companion for ipf and it is not yet here? Propose!



Google Trends

Scale is based on the average worldwide traffic of ipf in all years. Click on graph for more.
ipf
hella
lightforce