There are three distinct population of Fuscus, The northern territory (australia) Queensland (australia) and New Guinea populations.
The queensland and new Guinea specimens are generally much more aggressive. Queensland specimens are essentially unvailable in herpetoculture, and new guinea specimens are only occasionally imported.
The northern territory form is the only Australian form available and they are quite difficult to find, They have become all but forgottern in the "morph craze"
If you are very lucky and find one they genrerally have calm personalities and are very easy to keep.
I keep a pair of the northern territory fuscus and they close to solid black.
Nick