Where can I find a Husk Bully?
The comments on the Hollow Knight wiki show several locations (outside the Crossroads) where you can still find the Husk Bully once the Crossroads have been infected.
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In Greenpath:
In the City of Tears on the path to the Nailsmith.
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In the connecting area between the Ancient Basin and the City of Tears (right above the tram):
As Exerion mentioned in a comment, there also some in Deepnest.
You can distinguish Husk Bullies from Wandering Husks a) by their smaller heads and b) by their charging attack (Wandering Husks walk towards you much more slowly with their arms flailing).