Dingo, I draw my own plans and patterns, and build my models from writing tablet cardboard. I have written a booklet for building the Avanti, but without the interior and clear windows. It is not free, but is not very expensive, either. Please see my eBay listing for details.
http://www.ebay.com/itm/221023483292?ssPageName=STRK:MESELX:IT&_trksid=p3984.m1555.l2649