DB8014 i think is the 4 spot ground (http://www.midtownsounds.com/db8014.html), which I think you could just use two of those (one power one ground) but if you have to have a fused power dist block take a look at http://www.midtownsounds.com/tsfdb4-manl.html

The title is a little confusing because it says (4) 4ga or 8ga out, but then you read the descrition, it says (2) 4ga out and (2) 8ga out. So Im not sure, but this should get you started.

It looks like Ian used 2x of the DB8014, but not sure. Maybe he can confirm.