under Danilo Benardelli, the nearest you could find to a Refice specialist since he also recorded Margherita da Cortona in 1969. The principal singers are Renata Mattioli, Renato Cioni, Walter Monachesi and Laura Londi. Unfortunately I've never managed to track this down, but the singers all did good work in their day (Mattioli's excellent Liù sometimes turns up) so I can only hope it exists somewhere