Hi Mauro,
If Members cannot help you, you might try contacting Tom Knox at the NAPCA and ask him if he might be able to sell you a back-issue of AutoMag.
If he will only do this for current Members, let him know that member "Pete Ebbink" will request and pay for it...and I can mail it to you.
Tom's contact info :
http://www.napca.net/communicate/