Here is the datasheet:
I also found a couple of other places that stock them.
It's good to know arcadechips is back up and running. They have some really hard to find chips.
After playing with Joe's board, I am starting to think the amplifier is still good. There are only 3 components that hit the 12V power line. The amp and 2 caps. I swapped in 2 new caps and the amp from my dead MP sound board and Joe's machine came up just fine. He has sound and music now.
Later (after my 9pm posting), I tested the the 2 caps I pulled from Joe's board. The tantalum one showed almost no resistance so I think it was shorted internally. The 100mfd electrolytic tested good. So for now, I think I will just solder the amp off Joe's board onto mine and throw it back in the box as a "one of these days" projects.
I appreciate all the help.
ken