955H turbo replacement

i have a great running 955H 60A2635 track loader, except the oil seal in the turbo went. cat says they can't get a turbo for the machine because its out dated.
i believe the cat turbo number is 7M0166.
any body know of good place to pick up a new turbo?
i really rather just replace it with a junk yard turbo but i can't come up with one.
Im also considering just putting in a seal kit for the bearing if i can't track down a rebuild kit.
I'm looking for the cheapest option as this machine...

955H turbo replacement

955H turbo replacement