When I built my son's arcade machine last year, I made a template to use for both side panels. I've had the MDF template in my garage for over a year now, and I'm doing some cleaning.

If anyone in the DFW area is interested, you can have it for free... don't want to take it to the dump unless I have to.
Message me if you're interested.
In case you haven't seen the arcade machine, I documented the build here:
American Ace