you can only get the complete head mate and the price you pay for one you just as well get a new lamp, anyway it sounds like your lamps f**k if it has melted the lens
lamp is only a few month old mate, still has all origonal components in it, plugs, wires, switch an fittings, all i done since i had it is stick a cable tie inside handle around wires to stop them pulling out, an taped up the cigar plug an connected to a lithium battery which also has all origonal connectors an such
if the lamp is fooked throo no fowl play, do i realy wanna be spending another 130 notes on 1, tha