DMcGSorry to be so long getting back to you But I seem to have mislaid this website for several days! :D
Anyhow My copy was Published By Eyre Methuen and has the ISBN 0 413 29910 4 and cost me the princely sum of 75p (about $1.10) I have checked the Methuen website but it is not presntly listed and so may well be out of print. You could try writing to Samuel French Playscripts as they may have sets for performances?
Can't help beyond that. Sorry again AWM