I don't think a clevis has ever broken. Even if it was a broken clevis on that one aircraft, the report states that the clevis was modified with a notch (definate no-no).
I'm sorry I even started the thread down this path. The only point I was trying to make is that for whatever reason, someone yanked on that elevator to break that wing...simple as that. The structure performed exactly as intended. The whole clevis thing was more of a mental exercise and I regret even mentioning it at this point.
The stock clevis is perfectly OK