I've done it in micro 4/3 mount. It was a while ago so I can't remember all the details, however, I used a C-mount adapter (which for micro 4/3 is the thinnest adapter you can get - basically a thin plate) plus a spacer, made, if I recall correctly, from drilling the centre out of a plastic cap (can't remember what it was from now, probably the fint cap that came with some adapter or other.
Basically what you need to do is put the adapter on the camera, hold the lens up in front and figure out approximately what spacing you need for infinity focus, and then find something about the right thickness. Then put the whole lot together, try it, and see if you need to make adjustments. The good thing about using a plastic spacer is it is relatively easy to sand it thinner, provided you put sandpaper on a flat surface, and move the spacer around while sanding.
Once you have got it how you want it, epoxy the whole lot together.
And by the way, you don't need to remove the shutter from the lens, you just need to make it always in the open position. As I recall I removed a number of items from the shutter mechanism ares, found what actually opened and closed the shutter, opened it, and then jammed it in that position.
