SIG kits are available but are a bit $$$$, corflute materials are available from connect plastics in Carrum Downs, most of the other stuff i get from Bunnings or Kmart, the plane bits i get from Addie's hobbies in Mordialoc.

some of the guys from Saturn hobbies fly at Caulfield, thay know about SPAD (but they prefer if you buy one of there balsa kits)