Do they make a CH type BA breaker handle tie. Been going rounds with the supply house. They say they don't make them, but I would be mighty surprised considering the recent code changes to mwbc's.
If you're talking about BR's, the part number is BHTCS. For BR tandems, the part number is THS1CS for the inside two handles, and the part number for the "wing" to do the outside 2 handles is THOWCS