Thanks, I ended up buying them from Mouser. I had been hoping to get them from a local supplier, buy Australian and all that, but none stocked that brand. The worst is my local B&M store, Jaycar, that only stocks mediocre brands like Samxon and Suntan and nothing above 450v.
You will find it right here.
https://www.mouser.com/ProductDetail/Cornell-Dubilier-CDE/380LX331M550A052?qs=7D1LtPJG0i3i3frrZ2pGDQ%3D%3D