PSS-03-1202 (inesert design book issue 1, June 1987) available as a photocopy (as its out of stock) for a price of 25 euros from the following address.
ESA Publications Division
Mr. Rory van Haarlem
Postbox 299
2200 AG Noordwijk
The Netherlands.
Fax: +31-71-565 5433
Tel: +31-71-565 3405
e-mail: <Rory.van.Haarlem@esa.int>
I think ESA is in the process of developing a standard document approach which is called ECSS (European Cooperation for Space Standardization)
Also i think the handbook is/was being updated to include simplified mathematical design approaches and composited skinned sandwich panels rather than metal skins.