When I was using the B&M pro stick I had it mounted to the left side under the shift ball. That way I could push it with my left thumb. I have since switched to a SCS and I use the button that came with it which is in the same place. This way you can hold the button with your thumb and still...
I would try a left handed drill bit first. Once it grabs it should back out the bolt. Make sure that you center punch the bolt before you drill it or the bit might go off center. If that does'nt work you will already have a hole for an easy out.