I'm looking for a drop in replacement or kit that uses the stock airbox and intake manifold. I am aware of the XRs Only Mikuni kit which is a pumper for 450 or so and the Sudco Keihin FCR41 kit which is 550. Are there any cheaper options? I don't need an accelerator pump. Does anyone make a kit for the XR650L with a round or flatslide non pumper slide carb in the 200 to 300 range? Google has turned up nothing.