I’ve now got all the bits to make up the centre cubby box with ancillary power supply and rechargable torch.
Not wanting to cut up my original box I got a used one from eBay. The cut outs where the socket and torch fit are clearly marked. I carefully cut around the outlines with a sharp knife and filed the edges smooth.
The next stage is to make up a wiring loom to suit using the wiring diagrams from the manual.