An option that I've used for patch leads before now is my local Toolstation
http://www.toolstation.com/shop/Elec...ms/d190/sd2745
if there is a branch near you, it's owned by the folks who built up Screwfix before selling it to B&Q.
Now Screwfix
http://www.screwfix.com/cats/A331844...ng/Patch-Leads
have branches it's worth giving them a check as well to see if they have a nearby branch.