They can't be bought as an arf or arc, however Dave Dessecker does have the kits for the Weeks Solution. His email is
http://davepeg@wilkshire.net. Email him and tell him you want information on the Weeks and he will respond quickly, great guy to deal with also. Precision Kit Cutters also cuts the kit however when you get one from Dave he includes everything to build the airframe or you can buy a short kit.