Annular intake like a Leduc on some F-104 parts? Could be done if you like NMF aircraft. No sign of vertical take off gear. Could be a ramjet, which are inherently cool. 1/48 aft and 1/72 forward of the wings? Lindberg and Heller kits are cheap, and the firepower Lindbergs come with all kinds of extra bits. No need to stick to the silver color scheme...