Here is a copy of Penguin Plays PL71 - New English Dramatists 11, 1967, 239 pages containing the scripts to Happy Family by Giles Cooper / A Night to Make the Angels Weep by Peter Terson / Fill the Stage with Happy Hours by Charles Wood, all in good condition.  I have hundreds of first Penguin editions for sale at my Kongwak store in South Gippsland which is open every Sunday - keep watching for further listings..