No, sorry no “ins” anymore–time passes, alas. But the school did use to archive all performances there: always audio and sometimes video for special occasions.
While I was there she also played the world premiere of a piece called “The Marshes of Glyn” (can’t remember the composer, but big harp part) and the Debussy Danses with some symphony members and I do remember a video camera there (they were too big to miss back then). Possibly the RPO would know who might have that footage. It would have been in ’83 or ’84 I think. It was not in the Eastman Theatre, though, but in a local church.