Looking for parts for Final Drive for a Cat 315bl pn 148-4570

Hello all, I know its a long shot, but there is lot of resources on this site. One of my final drives has failed, gear sets chipped up and shafts chipped up as well. Need bearing sets, seal kit, gears etc. Thought I would simply put a post out and see if anyone might have a complete used unit available or maybe some parts. Replacement components through the OEM are very pricey as we all know, so nothing to lose in starting here first. I have reached out too some of the larger players in the rebuild and parts groups, online etc... Very limited luck in that area.. Guessing this particular unit had minimal failures as most of repair / re-builders have nothing for these where they do have much for the units that tend to fail more often?? I guess?? More common machines, or maybe simply more of those were produced.

Anyway, please keep me in mind if anyone has parts machine or the like and might consider parting with a good functional complete drive unit.

Thank You, Nick Rochester, NH

Looking for parts for Final Drive for a Cat 315bl pn 148-4570