Rebuilding the bottom end in a CASE/David Brown 1594 and was able to find everything easily enough except the thrust bearings. 

Case part numbers are:

K917636 lower 

K917635 upper

I need standard size bearings. Anyone know if these bearings interchange with other engines? Measure the bearings that came out they appear to be about .093" thick 2.970"ID 3.620"OD

-Thanks