Radio harness adapter/extender

[UKenGB]

Couldn't think what else to call it, but what I need to do is cut the audio output wires from the radio module and insert new amps (with an LOC if required). But rather than cut the OEM harness, I'd like to get the equivalent of an extension harness that I can cut and use to feed the amps and then return to go to the speakers via the original wiring. So I can simply unplug these 2 connectors and plug the original wiring straight back into the radio module and it's then back to stock.

Of course this could be a male and a female of the radio module connectors and some tails on each that I can connect as I want, but an extension that I simply cut in half would do the same job.

As my X5 is a 2004, I assume I have the square pin connector type. Is there such a thing available?