A few weeks ago, I joined the Project MAME group on Facebook. If you're the least bit interested in building your own arcade cabinet and/or controls, I suggest you join! Looking at some nice bartop cabinet builds posted in the group, I got in contact with one of the members who shared a two-player control panel layout with me in PSD format. Using this, I made a 3D sketch of what my panel will look like (using SketchUp):

The dimensions are 525 mm x 185 mm x 10 mm, and in my real build it will likely be in MDF. I'll need to route some mounting holes so that the buttons and sticks, but that's a later issue.

That's it for now! :-)