You know what man, Anthony Burgess and I did some research last Spring into this. What we found were very expensive (real) scoreboards that can be purchased commercially and basically hung on the wall. Most are about several feet by several feet long (for example) and are operated by remote control.
I think this is a want more than a need but I confess that it would be great to have a real scoreboard up on the wall in my gameroom.
I know that you were meaning a scaled-down version of a real scoreboard, and I think that this is a good idea also.
I found this on eBay...It is a basketball scoreboard though. Anyway, take a look and add this to your research.
http://cgi.ebay.com/Portable-Tableto...QQcmdZViewItem