Today, during another round of obsessive googling, I discovered Shannon Appel's index for Vortext magazine, a game publication I don't recall encountering before. (Incidentally, Shannon's indexes are a great resource for any gaming nut.) Apparently, issue #4 of Vortext inluded a Synnibarr adventure, "Bio Starr 1", by Raven McCracken and Bryce "Playing Synnibarr will open avenues in your imagination for
which you probably did not even know you had an address" Thelin. I must track down this magazine!