wiring loom extension

morning. I've built a little box to sit behind the handbrake on the centre console to house the cb and radio and were wondering, before I start chopping and soldering, if there is a ready made up wiring loom extension jobby available that I can plug in and play to move the radio? I've searched and had a look about, but cannae spot owt. ta muchly
JKx

yes

thank you...

so any idea where I might find such an elusive beast?