That mat would be bigger than most Mat cutters that someone would have at home. The largest Mat board I seen at Jerry's Artarama was only 32x40, I cut a large mat consisting of a whole sheet of Mat board but I had to move my mat cutter along an edge, but it was for myself and worked pretty well.
As we don't know where in the world you are... it may sound daft but have you Googled the question, you may well be surprised that there is someone quite local to you.