Pinsound was a life saver for me back when I was working on my LOTR machine. At that time, the whitestar MPU/Sound board was not available. A pinsound board was my only option, and it worked out great for me.
To add to this thread, I too had a hard time finding a replacement pre-DCS sound board for my TZ. I think this is one board that is overdue to be re-made. There are a few on Ebay right now, and the asking price seems to be right around $200.