What I meant, is that people will pay for just the wood if it is a Robotron. It is a stenciled game, which means you can paint new sideart, and all the other art is reproed.
Anyway. An oversized panel would look terrible on that cabinet. I would just see what I could fit on the original one.
BTW, all the Williams cabs have minor differences, but share a lot of common dimensions. (But each one has at least one major difference). IIRC Stargate and Defender had wooden control panels, while the others had metal.