re routing the lines & changing to metal would be ideal... but if you dont want to do that then check jegs or summit for heat wrap or heat tape, all kinds of relatively cheap options. if you dint want to unhook one end of the line to slide a true heat jacket over it, they sell heat wrap that is split down the center & uses heavy duty velcro to close it back up. or real heat tape with adhesive on the back to wrap around the line.
& you dont want or need to wrap the exhaust pipe, its best to wrap the line itself & uses less or smaller material. also that far back in the exhaust the pipes arent really "that" hot so a layer of the cheaper/thinner stuff will be more than enough. heres the split velcro stuff from summit...
https://www.summitracing.com/search/...asummit-racing