Phatnoise Cable - Where From?? Anyone Got One Spare??

[NS1]

I need a Phatnoise interface cable (connects from Phatnoise to CD changer harness) to install in the glovebox of my A4, the cable needs to have the square VW connector & not the round Audi one.
I have tried the local Audi dealer, but they want £50 for one & VW dealers don't sell them.
Can anyone tell me if there is another place i could buy the cable for a more reasonable price? Or perhaps someone has a spare one that they do not need??

Thanks