SCORE! I went to the school district garage where my bus hauled kids, and they gave me a library! I have parts manual, chassis lube manual, all maintenance records for bus since new, a level one service manual for the CAT motor, and a bunch ov repair parts he will no longer need. (Complete bearing set for front end, headlight switch... and a rebuilt hyd motor that drives the coolant fan
$500 at the parts store.
When looking for sources, don't forget the obvious ones.