My '79 CB400 has a few wires which were originally protected by a cloth-like material. It feels like a mix of cloth and plastic; hard to describe. Regardless of that it is, it's falling apart - disintegrating from the lightest touch. What can I use to replace it? Are there similar materials I can buy and slip over these cables? The material must play nice with heat, as this is right on the motor, so no electrical tape... Suggestions?