Here is a picture of me using the saw microphone (actually, the cord goes behind my hand, I was just posing for the picture). Aim the Mic at about a 45° angle. The beauty of this arrangement is that no matter how much you bend the saw, the mic stays relatively close to the blade. More important, you don't have to worry about banging the mic with your saw so you can focus on playing.
The mic has a tendency to pick up bow noise so if you can dial the treble all the way down you will hear just the saw and no bow noise whatsoever.
If you have your own Mic, you may purchase just the bracket and tip handle (Everything except the microphone - you would slip you mic into my mic holder.)