how about the complete Goldberg Variations?
Gubaidulina, Chaconne
Dutilleux Choral et Variations
How about this:-Brahms Paganini Variations Book I-Brahms Paganini Variations Book II-Liszt Paganini Etude No. 6-Muczyski Desperate Measures(intermission - bring out second piano)-Lutoslawski Paganini Variations for 2 pianos-Rachmaninoff Rapsodie on a Theme by Paganini (Orchestra arranged for second piano)
Looks like a program of Paganini's 24th caprice variations.