Uew,
I replaced mine a few years ago. Oil Seal,Outer:70x85x8 R21. Oil Seal,Inner:Original carried #W31917550 R4,was metal cased but had rubbed on drive flange. I replaced with slightly shallower, double lip 1 3/4 x 3 3/16 x 3/8 R23 with rubber case. Bearing, Outer Timkin 2774/2720. Bearing, Inner: NTN 2788/2720.
Bearing King in the UK were most helpful (usual disclaimers) but I don't know if, in particular, the Timkin is still available.
www.bearing-king.co.uk John.