Welcome to Geekhack!
Yes, difficult to find things here. There's not many Aussie keyboard shops. PCCaseGear has a reasonable range. MechKB.com.au also has some harder to find items.
There are one or two other places that sell mechanical keyboards, but not usually as a main stock item.
Btw if you liked the buckling springs, you might like MX greens. Kinda like MX blues, but with stiffer springs.
Clears are also great, I love typing on my CODE with MX clears.
Oh, nearly forgot - Massdrop can offer reasonable shipping prices on most keyboard-related items, and if enough people buy into the drop then the price can start to appear quite good too.