I haven't seen any that have been shot through deer and into the ground that were suitable for re-use... but the replacement blades are certainly scarce none-the-less. Plenty of folks shoot some jacked up heads and never know it until their POI moves 3" in random directions.

Look on ebay, or on some off the wall, small shops online. Forget BPS, Cabelas or Gander online. Some of the small e-shops on ebay may well have what you are looking for, and probably for less. Most offer free or reduced shipping with buy it now. I've gotten lots of stuff I otherwise could not locate this way. Good luck.