An alternate option if you can't get RCV axles: you can get a part time/2WD kit. That way if you do happen to break an axle you can just disengage the front hubs and drive home in 2WD without spinning the CVs. Just an easy alternative to actually doing a trail repair and removing a broken CV. Obviously there might be scenarios where this wouldn't be ideal, like if you break a CV halfway through the rubicon or something. This is my plan - most of the trails I run, I bet I could make it out with a locked rear end and/or some pulling from a friend.