We do not carry that specific Whirlpool wrench. There are some universal wrench options that you can choose from.
There is the strap wrench that you can adjust to fit your size housing:
http://www.waterfilters.net/Adjustable-Strap-Wrench-6890034_p_0-1475.html
There is also the universal 1/2 wrench. The dimensions of the C-shaped opening are listed on the following page so you can see if it will work for your housing.
http://www.waterfilters.net/Universal-Water-Filter-Housing-Wrench_p_0-1494.html
Thank you,
WaterFilters.NET