Product review (5 stars): Fixes the leak but not the real problem
If you find yourself here looking for this do yourself a favor and check your air inlet damper!

The air inlet damper has a little door that lets the cold air in the freezer into the refrigerator. The common problem with these refrigerators is that the damper door breaks off and lets way too much cold air in effectively freezing the refrigerator section. Once the water tank is frozen the expanding ice in it cracks the case of the water tank spilling water inside the refrigerator, which is likely why you are here looking for this.

As far as the water tank here goes it isn't too difficult to replace and doesn't require any more than the common hand tools you likely already have. I found this to be a direct replacement.