i've been a bit reluctant to share the stl file....
not because i dont want to share, but my 3d designs skills are very poor (i had never done any design or 3d printing until i started this project)
its a very basic design, easy for me to do (or as much as i could handle at the time).... a box on a cylinder with a hole going down the middle
https://drive.google.com/file/d/0B2BZT9 ... sp=sharing
NB: any printed part will not be plug and play.... so modification will need to be done, based on the length of the tactile button used