Okay, granted, I've never looked for it. But I always sort of thought of the recipe for the starter of the Amish Friendship Bread as somewhat similar to a unicorn, in that it was a mystical creature that could not be found. (A unicorn, by the way, is another thing I've never looked for.)
However, over on Little Birdie Secrets, the starter is shared today. I'm kind of excited, no lie. Now I just need to invest in some Really Big Ziploc Bags.