Drilling holes for Sanwa buttons

Is there any drill bit/hole saw out there that will drill the 30mm holes for the Sanwa buttons? 1-1/8 and the button wont go in all the way. 1-1/4 and the button goes in but is a little loose.

I'm not sure if they are readily available or not, but why not just go to the hardware store and pick up a 30mm drill bit? I would imagine they sell metric bits (just like with wrenches and sockets), so that might be the easiest way. Otherwise, you could just use the 1 1/8 bit, and file the hole out until the button fits snugly. Those are my best suggestions. Good luck!

Why not just make the 1-1/8 hole and then dremel/file a bit of it out?