Hello I'm new here. We have a 1987 mack r model with a 6 speed double stick tranny trlx107. I snapped the rear output shaft coming out of the tranny that goes to the driveshaft. Mack tells me the part is no longer available. Would anyone know where to get a used one or has a junk tranny laying around they could sell the shaft to me? Any help would be great we have a farm and it's harvest season and our truck is down. Thanks in advance