Good evening Adrien,
My interventions have been unsuccessful for the moment.
However, I learned, by a friend of Belgium (a priori, he knew the composers of this piece) that these last ones were deceased. At the end of the interview, he promised me to intervene with friends to know by which means he could obtain this score.
At the moment, I haven't had any feedback. I keep my fingers crossed.
If I receive the long-awaited piece, I will hasten to deposit it.
As for the publisher, he answered me by e-mail not to have in his database the piece I was looking for. Has it been deposited? That's the question!
Well musically. MUSETTE27