Just FYI, XFT told me to contact Final Drive Engineering in O'Connor to sort out my bent axle. Final Drive only straighten axles, they don't have any uprated versions for sale as he mainly just does 9" diffs. But for an extremely reasonable price, they will remove, straighten and refit my axle. So it's booked in for Monday. Very friendly bloke there too. If anyone has any leads on stronger axles, I'd be interested in hearing about them.