Re: 1989 125 hp bearing
It is not sold as a separate part. It is only sold as an assembly with the forward gear. HOWEVER: I can tell you that it is a standard part. If you pull out the old cup (outer race) and remove the cone (inner race and tapered rollers) from the gear, they should have numbers. Bring them to your local bearing store and they can match them up.
BTW: That was the same part from 1979 Chryslers up until at least 1989 Force, possibly up until 1994