Bought some new plug leads from a seller on eBay - Mr-Retro-Leads-Plugs | eBay Stores. He claims that all leads are made to order so there may be opportunities to buy non standard leads. The leads seem to be good quality with a cable that has plenty of flex in it. The end caps are glued in place and the plug cap has a clip in it to grip onto the spark plug (removing the risk of it not sitting correctly). The cables are also slightly thicker than the leads I replaced. I chose black but other colours are available. For the cost (£33), I think they are pretty good value and do exactly what you expect them to do. New lead is the bottom one.
