Hey guyz,
today i was in the stage where I took the control panel off my arcade cab in order to drill new holes to make the cab from a 3 button to a 6 button. But to my amaizment found that the 2 joysticks are held by a steel plate

today Ive been round all the hardware stores trying to find a 1 1/8" drill cup to make the holes (which btw is 28-29mm in the UK) and havent found any, the closest I have come to that is 25mm and 32mm. Anyone that can help? know where I can find a 1/18" or a 28-29mm?
And also what is the easiest way to get through a metal piece also?

this has now staled my whole opperation and dont know what to do! I thought I had a problem in that I havent found the right size to drill a hole but now I also need to go through a steel plate.
What is the best solution now? what are my options? urgent help needed!
IM STUCK!