There is no universal standard, as different scoring machines use a different connector and/or pin-out, and differ as to whether the extension lights need to be separately powered.
-Dave
"I love deadlines. I love the whooshing noise they make as they go by."
-Douglas Adams
In our club we have a dad who is very good with that kind of thing and has made some for us. However, as mentioned, they are very 'box' specific as they all seem to have different power supplies and needs.
Email me off this list of you are interested but I suspect that unless you have the same kind of boxes we do, the lights we have will not work for you and your boxes.