I've Got One
Not only have I heard of one, but I have one for sale. The three page manual actually calls it the PSA-100 and it includes the 2-page schematics. Your post is quite old, so I expect you are no longer looking, but if you are, I want $200 plus $20 for shipping. It is currently posted at: East Idaho Craigslist in Electronics or you can call me at (208) 523-0149