Foamy Factory has haulted his kits (job pressures). http://www.foamyfactory.com/airplanes-kits.htm

Not quite flat and not quite a kit but Flitetest.com has downloadable plans for a Baby Blender foamie.

http://flitetest.com/articles/baby-blender-2-draft

You can buy the kit as well.

http://shop.flitetest.com/aircraft/b...eed-build-kit/