As the topic states. I'm thinking about the possibility of finding a professional shop that does extensive SMD reworking. Why not take the 604e 233 chip off and put say a 300 or 400 in it's place? The board may not be able to handle it you say, maybe yes maybe no. I'd also have the tiny jumpers removed and dip switches put in it's place.
So whatcha say techno gear-heads?