Wow. I have some Bayonet 3 bars I've been riding for a couple years. Just checked and it's the V2 bracket.
In this case I gotta say... it's a faulty design. Not only is there a sharp stress riser at the base of the bolt heads, there is hardly any thickness to the clamp at that point. Even if there weren't any failures (and it appears there have been many!) I wouldn't expect that clamp to last.
For the sake of anyone else with these bars, this is the broken bracket in the original post:
This is what the new bracket looks like:
And this is a comparison diagram from Felt posted earlier in this thread:
The brackets aren't for sale anywhere that I've seen. Going to call Felt, and hope they'll ship them to me. The nearest dealer is over 300 miles away.