E3d V6 clone bowden to direct drive adapter

I have a clone of V6. does anyone now where I can find adapter that would screw into the heat sink to convert this:



into this:



If adapter like this does not exist how do I go about attaching this heatsink and a teflon tube that goes inside it to BMG direct drive extruder? There is a big gap between the wals (thread) of the heatsink and the tube should I just leave it?