hi, yes Frankenstuff makes these / made these - well similar ones. I tried to get some of his in 2015 and he had some trouble making them for some reasons. After some email ping pong with him, I decided to may give it a shot to try to make them, could do my own, a friend of mine did the CAD and another machined them for me - I have made 5 off them, for my mates and 1 for me. cheers