Thanks JW for the tip on substituting a "-" for a "0" in the part number. But the old transmission doesn't look like either of the two you linked. I've attached pictures showing the difference.
The first picture is the original and the second picture is the new one (206707). As you can see, in the old transmission the gears are horizontal. Whereas the new one, the gears are vertical.
I want to make sure before I start tearing down the machine, the new transmission will indeed work as a direct replacement for the old one.