Back in October, the cesspool that is CL smiled upon me, and I picked up a Robotron cocktail in very decent, semi-working condition. After getting it home and starting to go through it, noticed that the speaker grills are done very differently on these. The plastic mesh was formed into the approx 3' hole drilled on either side in the wood, to be flush with the outside face from the inside. On mine, one was completely busted through and missing the front (as well as the speaker behind it), and the other was punched in. Both were extremely brittle as most plastic Williams speaker grills are after 30+ years, so hey, replace them as usual. Well unless I missed something, it doesn't appear these things are available through any of the usual channels. They were bugging me too much to just leave them, so figured, how hard would it be to make these?