Hi overloom, sorry I'm a bit later to post this, I'm in aust as well.
I just had my injection pump repaired by a guy in Sydney, mine was just the pump leaking and it hadn't got into the electrics yet which was lucky.
this guy was doing exchange pumps for around $1500.00.
I also saw one on ebay for about $1350 exchange as well.
if you would like I can pm you with the info or pm me your number and we can chat.
hope it gets better soon