my veion of the classic blues harp mic the "green bullet" (although mine is printed in white :P) it should only cost about $15-$20 to make the BOM (excluding things like screws, i didnt need any in the one i printed due to the front being nice and tight) I made a BNC veion just because i think the socket is less likely to get noise or pop out or get loose.. but i have made a 1/4" jack veion although i havent printed it to see if it all fits.. but it should. 3mm self tapping screws should work to hold the flange in and the front can be mounted with 3X2.5mm self tapping counter sunk screws if you prints loose the STL files have been fixed to recess the volume pot a bit deeper into the mic so the knob sits more flush with the body the mic: Volume POT: the Knob: if your making the BNC veion: the standard 1/4" jack veion: to make the BNC to 1/4" lead i changed the plug on one end of this cable: to this plug: