I have a nice set of jumper cables that have gotten old enough and abused that the clamps or useless however the cable itself is good. I did a search for replacement ends and came up with basically two options. This one from summit looks like the best bet but could still be crap. Anyone use these "parrot" clamps?
http://www.summitracing.com/parts/kti-74535?seid=srese1&gclid=CNrS0Pzc4LwCFckWMgod6XUADQ
http://www.summitracing.com/parts/kti-74535?seid=srese1&gclid=CNrS0Pzc4LwCFckWMgod6XUADQ