i do not have this now but i will be in our score library tomorrow doing some scanning and research of my own. it would be little trouble to grab this and give it a go.
my catalogue entry shows
Chant de Linos, pour flûte principale, violon, alto, violoncelle, harpe ou piano. [Partie de harpe avec le concours de Pierre Jamet]/ Andre Jolivet.
Pub Info Paris : Alphonse Leduc, 1954.
can you confirm you are looking for the flute and piano parts of this ensemble score, just want to make sure you are not speaking about some re-arranged version for solo flue with piano reduction accompanyment, as that I do not have access too.
note i will not be able to post this i would need for yout to send me a PM with an email so i can either send you the file or give you a download link to one of my online media hosting accounts.