Didn't find 'em till tonight, but I've got 'em now.
Each control panel is 15 3/16 inches wide. They're about 2 3/8 inch thick, but they're hinged , so they can be opened or shut to make them a bit thicker or thinner depending on how far apart your mounting holes are. The useable control surface is 7" front to back, but the leading edge of the panel will stick out about another 3/4 inch, if it matters.
The overlays have some cracking/wear, but are still pretty good.
Here's a pic- sorry about the quality, I had to take stills with my video cam. My new digital still cam should arrive tomorrow, according to FedEx.com, so if you're still interested, PM me and I'll take you some better shots. And let me know if you need any other measurements as well.
(Pic shows spinner & buttons, but I'm keeping those. I will leave the wiring & molex underneath, though.)