IMHO, this would be a more promising route to pursue than Powertrax(though why not pursue as many routes as possible). I know when the aussie lockers came out and got some good reviews, a handful of Isuzu people sent out e-mails to the TORQ Masters in interest of having something made for our rides. And from the responses I read, it seems like they were open to the idea if its worth their time. But the interest and enthusiasm also dwindled down rather quickly and not much has been said about it in a while (which seems to be a common trend, unfortunately). I'd love to hear that one of the initial people sending e-mails has kept some kind of steady contact with TORQ Masters ever since, but I'm not too hopeful.

If you are volunteering yourself to undertake this kind of endeavor, I'd suggest contacting TORQ Masters for sure:

TORQ Masters
aussielocker@offroadlockers.com
585-723-1489

I love my ARB, and will always consider a selectable locker the best option for an off-road used DD. But not everyone cares about road manners, or wants to drop that kind of coin.