This piece.... well the score is mostly kept by those publishers that we know of.
Yet, this is a manuscript of the piece, copied by Marco Anzoletti, which already is in the public domain.
Thus, problem solved.
What makes it special is probably the G-string.
As in what I know of Paganini’s pieces, only 3 pieces have same application of single string violin - Moses Fantasy, this piece, and Maria Luisa Sonata. (If there are more, please comment below to let me know!)
A bit similar to Moses Fantasy, except this piece has a little bit more difficulty.
Hope that you enjoy the piece(?)