I too need a "NL4 Speakon Equipped 13-4 Bi-Amp Speaker Cable" to seperate the B1's, but Audiopile won't answer my emails.
Do you know of somewhere in Australia that sells them?

They replied.

They didnt JUST reply but were helpful to the extreme, it seems my first email was never found. We don't normally get that sort of good response down in Australia, only from ebay.
Looks like the cables are on their way.

The cables arrived today, and man, are they heavy duty! That was only 5 days from the US which is better than we get from one side of our county to another.