Yeah if i could find an 8x8 toy thingys, all i want is the keypad, leds and switches and i'd have to hack it apart and use my own interface chips. I'm gonna keep looking in the $2 shops, surely there is something out there!
Ok I probably shouldn't be telling others about this, because it will make my chances of finding a ridiculously cheap one on ebay that much harder, but look out for "Lights Out"
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http://www.edcourtenay.co.uk/2002/04/10/LightsOut.aspx
Only 5x5, but keypad and LED in one.