MRT Performance in Sydney who I bought the sway bar off were extremely helpful. I sent the bar down to them, and they forwarded it onto Whiteline. Received a call today from Whiteline saying they are going to make me a brand new replacement bar

Only problem is it'll be about 2 weeks due to easter etc. But still happy it was resolved with no fuss. Currently driving to and from work without a rear swaybar installed... such a boat around corners lol