Best I know, it's only been in the now defunct magazine. Great article- very long, detailed and amazing photos and illustrations. I have a copy. If you are interested, I can copy it and mail it to you. PM me if you wish.
The magazine's back issues turn up occasionally on e-bay or on amazon but are usually quite expensive. Paul is affiliated with tTHe Walt Disney Family Museum in SF. You could try and reach him through them.
And, after writing the above I find that 4 issues are up for bid on e-bay
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http://www.ebay.com/itm/DISNEY-Pers...185?pt=LH_DefaultDomain_0&hash=item23247e7731