Fluffy can get almost any car part you need (mainly European cars though), as he works at a motor factors.
The way his pricing works is anyone who contact him via the ClubCento forum can get the parts at his trade price (ie discounted from what Joe Public pays), but then if you are a ClubCento paid up member then you get the super duper discount, which even his boss thinks is taking the pi$$
You can collect, or he can post at cost, or he can arrange to have parts taken to club meets.
If he really likes you then he sometimes gives you freebies (ie I had 2 bottles of screen wash a couple of orders ago)
And he is even starting to hold stock of used items.
And to top it off, he has just issued a price list for real tuning parts, ie profiled cams, vernier pulleys, modified heads, valves, springs etc
So, yeah he will be able to get you a cable
EDIT: just checked his last isued price list and the Cinq cable was £7.24 to members.