I recently modified my heater hoses on the old 96er 4.0L, and because I didn't resecure them properly they drooped down and caused a short in the spark plug wire just under them. I know because the engine was missing and I could see the light of the spark coming through the wire insulation when running. The plug wire set is fairly new so I'd rather just buy one individually.

Who sells individual plug wires? Can't find them anywhere.