I'm still tryin to decide whether or not to reuse or replace my stock 416 axle. If I decide to replace I'll let you know and maybe we can work out a deal. Not sure where you are located, but I'm down in the Orlando area.
Is the ball coupler bolted or welded on? If the square tubing is big enough to house a 2" reciever then you could always use a Lock-N-Roll vs Lunette.....Just a suggestion!