Didn't think the 2.8 had enough grunt!
Quick trip to All Four x 4 Spares Newcastle running on my front tailshaft and for $220 I fitted a secondhand replacement shaft on their driveway. I'll probably take the two shafts to a driveline specialist and they can make one good one up out of the two. I don't really know how much work the replacement one has done, and I'm not willing to take the risk when touring.
It was good service from All Four x 4 Spares, as I rang them from up in the Watagans and they had just finished removing the shaft when I rocked up to pick it up.