Thank you for that BB. I've had no better success here. I don't think the (very nice) chap even knew what they were, even though the shop is Greenfield's distributor here in WA!
So, well, s#@t. I either gamble on a return to production or try to find one elsewhere. What a pain.
Sounds reasonable regarding the GCV. I need a bit of a clean-up this end. Won't help much though, I'll still be working on either the pavers or concrete flooring!