The old men said: go to the source: www.apostoloeditore.com.
All back issues are available since n. 57 till today. For issues before that, you can buy PDFs on CDs. Already in stock for years up to and including 1983. 1984 to n. 55 available soon.
Umm, Giorgio is updating the english site...
go here : http://www.apostoloeditore.com/Home.htm and search for "ordini" on the left menu bar.
Or write directly to: firstname.lastname@example.org, start the mail with a: Marco Comelli directed me to you. And ask for a quotation, I think that beyond a certain number of issues, there is an interesting discount.
Aerofan 100 has been shipped today by the printer to the publisher, so it will be send to subscribers during August. General availability will start immediately. Use info mentioned in an above posted message to order. Cost is 30 euros plus postage: two leading articles are "Last projects of Caproini-Taliedo, from 191 to 196" three of which are completely unknown (a jet fighter, a jet trainer and a basic trainer); second is (unashameful advertising : ) mine on the CR-44 (first ever published 3-views, side and vertical sections, section of the two-place version).