You should contact Chris at BPT. I listened to his battery supply for the SB the other night and it was absolutely killer. It's on par or slightly better than Wayne's (bolder cable) Ultimate Rev IV with the Aksa pre-regulation circuit that I own. Very close - very very close.
It's not an official product yet on his site but he's building a few to get feedback. It's also , 1/2 the price. If I didn't already have one of the Bolders, I'd buy it. Don't get me wrong, I love my Rev IV. The difference is not enough to change certainly.
Bryan