score:11
I contacted the Valdensian Seminary in Rome and got this reply, from Lothar Vogel, professor of Church History:
Dear Mr. Gunther,
I thank you very much for your kind request and for your interest in Waldensian history.
I can tell you that there are no sources concerning medieval Waldensian hymns or liturgies linked to Eucharistiv celebrations. At the latest from 14th century on the liturgical pratise was factually limited to confession, and the Waldensians participated at the sacramental practice of the "great church" (baptism, eucharist).
The answer is, thus, "no".