LED and MP3 Project For Scoreboard

The price is certainly right. How big is this board? Is there anything like this that is smaller? How many of those 12 shift registers would I need for this application? I'm thinking my Arduino is mounted away from the scoreboard (a cube like structure mounted about a foot and a half above the game surface) and a wiring bundle leading up to it. I was thinking the IC board would be up in with the LCDs to minimize a lot of wiring going all over the place. So I obviously don't want too much stuffed into the box for the scoreboard.
Thanks.