Maybe they didn't pay their website bill "lol". But seriously, I have bought some gear there myself, he has some good prices on the bulk deals he gets in and on old stock he wants to flush out, but across the board prices are not as good as I can get out of SYD or even the lads on the coast.
I’ve just been in the shop and spoke with Ron. He said that he is having some ISP problems, but if you type in http://www.sirius-optics.com/ (without the .au) it should work.
No worries Wol - I call in periodically to have a chat and see what new stuff he has. I saw some Optec stuff in the shop today - didn't know that Ron was a distributor of Optec gear.