Dana! This is something I've been working on. I spent a couple years trying to track down Dale Thomas intros (mentioned early in this thread). Last year, I noticed Scapehunter on the LA was selling some, including a few that he had introduced with Dale's permission for him.
I see Scapehunter only has one item on the LA right now, but I bet if you contact him, he can give you a list of the lates he has available. I bought from him last year, and he did a real nice job... if you're interested.
Time to Ponder -- Thomas-Simoni-Wastila 2017