Wild idea ( I certainly dont believe in clones, nor do I support them at all ) but the Manhattan was cloned. So its possible if its a 1:1 clone by infinite or any 1:1 that parts might fit. So you could possibly purchase several cheap clones and interchange pieces to get the look you are looking for. (which clone companies always make wild colors on there devices)
Second idea: If you contact Amera Vape they sell pieces you are looking for. I would contact them soon before there stock runs out considering they stopped manufacturing and selling the manhattan. I bet they will always keep certain parts or be able to make them again if needed for warranty issues etc but probably not in all the colors.
( I certainly dont believe in clones, nor do I support them at all )