... More seriously, Rapid Electronics sell "Control Cable" that matches your description. 5-core is 4 cores numbered black + green/yellow for ground. Available in 0.75mm (6A rated), 1.5mm (16A) and 2.5mm (20A). Prices from £13.90 to £30.25 for a 50m reel. I expect RS/Farnell/etc. all sell similar products at similar prices. You will be stuck with buying a full 50m reel, though. If you want less, try a chandlery (long shot) or maybe a motor accessory place?
Ah ha, this is my forte! /forums/images/graemlins/grin.gif
Is it PVC or rubber?
What colour is it, grey? If so it is a YY controlflex.
There are a few variations on this theme, SY with a clear sheath?
Please post a further post or PM me if you require any further info.
most 5 & 7 core flexes are 5 diffrent colours, you may find a difficulty in getting one with 5 or 7 diffrent colours. as sneddon put it correct if you go with a YY or an SY cable you would have more chance. good luck