So far I've seen NONE designed for the purpose I have. If you find one, I am interested. But it must be an exact match. Not oversized and not with a whole bunch of extra holes I don't need. Here are my specs for splitting 400 amps to 3 separate 200 amp MCB panels:
Per pole (2 hots, neutral, and ground):
1 hole fitting 600 to 1000 kcmil (e.g. not smaller than 600 and not larger than 1000). Not more than 2 holes (I'll only use one).3 holes fitting 4/0 (211.6 kcmil) to 350 kcmil (e.g. not smaller than 4/0 and not larger than 350 kcmil. Not more than 4 holes (I'll only use 3).