Just a update for anyone that might be searching the forum later on. Ended up with the Tough Dog. Definitely a big fat chunky bar. Only just finished putting it on. Didn't measure it but its probably about 33mm OD, definitely much bigger than the factory bar. Not sure if they forgot to put the tap down the hole far enough or what as I couldn't get it short enough to centre the axle. Needed to trim the threaded bar end back a couple threads but still heaps of thread on it (probably 3 inches). Probably has a 4mm pitch thread so adjustable in 2mm steps every 180* and my axles centred within 1mm now. Much better. $275 posted to my door. A little bit of stuffing around but for the price I'm a happy camper.