Reb87, if you are looking for the -10 check these links, says he has "more than 10 available", $10 +$2 shipping for the M915A1 book, $8 for M915.
Truck Tractor, M915A1, Line Haul, Operator's Manual - eBay (item 350044232885 end time Jun-26-09 23:14:59 PDT)
Truck, Tractor, M915 series...