Are you looking for a modern one or a vintage one ? because most RV places will carry the modern ones like these, they are sold under the names Falk, Paulin, or Humphrey, they can be wall mounted or with an adapter ceiling mounted, they are rated for indoor use and most are listed as Propane but it's easy to change the jets to allow them to run on natural gas, all you need is a 3/8 copper gas line and a match...
