I was amazed to find the 43mm Ltd $584 for new in Australia:
https://www.crkennedy.com.au/pentax/index.php?q=node/325
I ordered it on Saturday, assuming it would be on back order forever, and it arrived in the post today (Tuesday am). Oddly, they delivered the silver version, 2010 date with Hoya paper work. Still, I'm pretty chuffed at the price, and I can't really bring myself to complain about the colour- it'll just make it easier to find on my shelf
Looking through the pages, most prices are below that of any other online Oz retailer (makes sense, since CR Kennedy is the supplier), but the 43mm looks competitive full stop- it's the same price (~exactly) as B&H in US dollars.