Can someone help me find the sheet music for "Fantasies on Flotow's Martha" for oboe and piano?

I heard the piece on the CD "Oboe Wizardry" where it was performed by Mark Weigner, oboe, and Arther Rowe, piano. I've had no trouble finding the piano part for Flotow's opera, Martha, but I can't find the title "Fantasies on Flotow's Martha."