also that LCD Tetris game Radica also did, the one with the big screen, people on ebay want £200+ for it(!) There's a smaller one that's still relatively cheap, but who knows if it's the same code.
I have the Laden vs USA game, I can provide that for scanning/LCD capture if the ROM can be obtained from another game (the Casio game, or the POP Station variant). Wouldn't want the Laden game to be destroyed though.