Thanks for the info. From following your links and doing a little more digging, I've found the MAN8940s at DigiKey @ 0.63 (but only if you buy in precise 660 unit lots!) and at Mouser for $1.30 (q.10); and the ICM7218Ds (Maxim, not Intersil, but still a modern, functional equivalent) at B.G.Micro for $2.25.
The schematics at
www.d-l-p.com were helpful to figure out which LED is addressed at what position on each 7218, but I still would like to know where the mounting holes are on the PCB; that way, I could make one that is a drop-in replacement for the real thing. Can someone stick a real scoreboard in a scanner and shoot both sides?
I'm looking at $25 worth of parts that I don't already own (got sockets, caps, etc.) and I was thinking about adding one feature - a 12x2 connector next to the 8x2, wired up to accept a standard DB-25-on-a-ribbon-cable (got a large box of 'em) so I can easily attach it to a PC.
It's a lot of work for a totally optional accessory, but it means that I can rig up a dedicated PC to fire off the game in a standard way and not have to have a monitor right there. If only we had a way to emulate the dip switches with _real_ switches...
-ethan