No I didn't buy the dictionary as it looks to be written in Chinese and since I can't read Chinese I didn't think that I'd be able to use it. I'd be interested in seeing that Facebook page. Could you post a link to it?
I was able to use the suggested websites with limited success.
Roger, Check the "Files" in Hoisan Phrases or Taishan Hoisan. I hope you weren't looking for automatic transcription. I don't think anything available yet, especially as there is no agreed upon spelling system.