Thanks for the info.
@cammd: so the battens are the same apart from the length of the tube part? If that's the case and you have one 1710mm long (without the adjuster), I'd be happy to buy it from you.
@JustinL: I did see that online store, just couldn't believe that could be the only/best way to buy bits in AUS. There's enough dodginess around the RSX web presence (Google saying neilpryde.com "may be hacked", and the AUS class association website going to a placeholder on Fox sports) that I was inclined to be suspicious of an O/S ecommerce site, but you've set my mind at rest on that score at least.