This is 2 versions of the screwed bowden clamp for ultimaker. The "Cut version" is designed to be added on the head, instead of the "Full top case" which is designed to replace the original wood parts.
Note : The pictures were taken with a beta version of this bowden clamp (The holes for the bowden tubes were too bigger)
Just print one of the two parts then add M3 screws. Becareful to not screw too much to not break the bowden tube.