Franz Liszt - Christus

[kolaboy]

Just a shot in the dark, here.

Back in 1981 the Alpha Repertory Television Service (ARTS - owned by Hearst/ABC) broadcast a performance of Liszt's Christus oratorio. Ever since I have been attempting to track down this performance in the hopes that it might be commercially available. Unfortunately I cannot recall either the venue, nor the performers involved.
My question: Does anyone here know of any videotaped performances of this piece prior to 1981? I know that there could not have been very many performances, let alone videotaped ones...

Anyway, thanks in advance.

Danny