Chic, many years ago MAN had a set of plans. i do not think there are avil. Maybe shoot MAN an e-mail to find out.

Ed Novak of Vintage RC plans had a 64" spanStaggerwing at one time.

RCM did a set some years back as well think it was around the 60-70" span

Nick Ziroli has future plans for a giant Staggerwing but will not be released anytime soon. Brief info is on his site http://www.ziroliplans.com under new products.

Back around 80-82 Air Age Publishers of MAN did a book called "Giant Step" : a book of giant rc aircraft. In the book was a construction article on a 96" 1/4 scale that was 34lbs the builder was Owen Morris. This could be related to the one MAN had plans for ????

Hope this helps in your search