Indulgences have never ended as far as I know. I think maybe they grew unpopular, but they have always been there.
In this regard, the current Holy Father has declared a Plenary Indulgence on three occasions already during his brief Pontificate. This shows that indulgences have never ended and are part of the Church. For a collection of Indulgences, buy a copy of the "Raccolta" which lists the indulgenced prayers prior to 1950.