It seems like you use your chillis a fair bit to have gone through that many!
Indeed, but have some help. I've become the pied piper of these peppers, telling everyone I know that they gotta try 'em, and dropping off 4oz. jars at their house. I always say: "They're hard to find now, but imagine what'll happen once the foodie world discovers them and causes a crippling shortage".
Imagine my consternation when I saw one of those jars untouched on a relative's counter 3 months after I dropped one off. Grrrrrrrrrrrrr.
As for your situation, that's a brutal shipping scenario if ever there was one. The things are already being shipped stateside at great cost, and then re-shipped to you in Aus... no wonder the mark up. You should seriously ask around your click whether someone knows Italian, so they can navigate a website for you. Or even just use Google translate. There has got to be a way to order a couple jars from Italy direct, and hopefully save dollars plural in the process.