as the Pastor said: "Recovering the saddle with new leather is relatively straight-forward. However, replacing the sections of the damaged and missing plastic shell is problematic if not impossible, and easily straightening the bent rail without damaging the remaining plastic shell, might prove challenging--- IMHO.

If you can find the same saddle with an intact plastic shell and okay condition rails, but a damaged leather cover, might yield an acceptable price..."
I.m a big proponent of "fix it, don't junk it" but if the shell is damaged, or the foam has lost the fight...you have to relinquish it to the dump. Recovering a tattered saddle be a satisfying adventure but not if you're just applying a thick coat of lipstick on pigskin...to mix some metaphors...