* International Music Score Library Project (IMSLP): IMSLP is a free online library of public domain music scores. You can find the vocal score for Penelope at https://imslp.org/wiki/Pénélope_(Fauré).
* Gallica: Gallica is the digital library of the National Library of France. You can find the vocal score for Penelope at https://gallica.bnf.fr/ark:/12148/bpt6k97588162/f1.image.
* Amazon: You can also purchase the vocal score for Penelope from Amazon.com. The score is available as a print edition or as a digital edition.