Johann Gaitsch, who runs Philomele, has done some great research on this composer. I have several of the chamber works mentioned above, as well as three volumes of short guitar duets. The duets were published by Musikverlag V. Hladky, edited by Carl Dobrauz, copyright 1949. According to the preface, Reb ay composed over 600 pieces for or with guitar, as well as two operas, two oratories, one symphony, and a great many other large-scale works.
PS--can the moderators fix the filter so that we don't have to mangle this composer's name?
Remember Anthony Weller, please help. Contact myself or Aaron Green for details.