Can anyone point towards a local source for Quadlock adaptors?

The stereo in the Multivan has been hacked into the original loom behind the quadlock and I'm looking to clean it up. So Quadlock to bare wires or Quadlock to ISO would be great. Even a Quadlock extension cable would be...

Looking to add an inline amplifier and subwoofer to a MY18 Tiguan without cutting/tapping/splicing the factory wiring.

Thought the best way would be to utilise a quadlock extender similar to this to incorporate the required wiring changes:

Ali Express 52 pin Quadlock E...