SPAD Models

I used to have a web page or two about these SPAD models, but lost it. I have a buddy who wants to build a couple of these from For Sale signs and such that plastic sheet is used on. My presonal preference is balsa convential construction...but he asked me and I couldn't find a web site any more. I think they even have downloadable plans you can used to make one of those flying stop signs or whatever they call them. Can anyone give me a web site or whatever???? Thanks, Frank Schwartz in Hendersonville, TN