Someone here may get it faster than I can, but.... There used to be a set of resin parts sold on ebay that added detail to the Kenner E-11. It consisted of a folded stock, short mag, counter, barrel tip, tail cap and swivel, and the cylinders on top of the mag. Of course it's not as accurate as a real E-11 build, but it makes the Kenner look a whole lot better. I have it on mine with some other mods. I think I have a thread on it here. I'll see if I can come up with the name.
EDIT- I had posted it over on FX-Sabers. Here is my thread on it. I hope the pics still work. PB is blocked at work so I only see red x's. Ebay name was filmfreak. http://www.fx-sabers.com/forum/index.php?topic=6833.0