Back in 2012, I was part of a Spy Fox fan project called “SPY Fox in Dry Cereal: The Lactose Cut”: it was a “demake” of Spy Fox in Dry Cereal in the style of old LucasArts adventures, and it would have also featured extra plot elements (in particular, William the Kid being lactose intolerant as a reason for his hatred of dairy milk, and an extra story path).
The project has been abandoned, but the demo can be downloaded here:
Story details can be read here: