It's impossible to find something about Eric Perier and this very rare French ballad, but it sure is nice!
Update on him from Bruno: (thanks!)
He had a few EP's out circa 63/65 and recorded a cover of 'Stand by me' in Italian 'Preghero' which he used to sing on stage in the sixties with his orchestra during summer outdoors festivals (fetes locales 7days in a row )in all the villages around Nimes and in the south of France. He went on being an orchestra leader during the 70's and 80's even 90's. He must be around 65 now if he's still alive. Anyway his orchestra still exists in Nimes (30000)whether it's been sold to another musician I don't know but if you type' orchestre eric perrier' on Google you'll find infos+ address and places where they played in 2006. Last thing his real name is Mario Pace.
Eric Perier - L'amour s'oublie