I think it is a Great Planes P-38, was only sold for a short time then discontinued, which is unfortunate. Now with electric power, would probably be a hit except that ARF's have taken over kits in a big way. See
http://www.greatplanes.com/manuals/discontinued.html, a little past half way down you'll find
Profile 38 - GPMA0487. It has links for parts list, manual and tech notes.