My workbench is 3x7 with the 9 inch opening of the Paulk total station (not the 7 inch of the original workbench). I just cut it out with my DeWalt track saw. I made the holes with a Freud 20mm bit, one of my PC690 routers, and the special router base plate that indexes off pegboard. Holes are surprisingly accurate. I made right angle jigs for it and the are as square as I can measure. I was concerned because the holes in the pegboard are not perfectly lined up but it doesn't seem to make much difference.
If you have a low cost way to have it CNC'd that is certainly an option. But it didn't take long to build my bench "the old way".