hvac thermo isolating tubes - they have a cut on the length but have scotch tape like sticky stuff on the length of the cut - you can wrap it around your rollbar and remove the protective tape to have it stick on itself. i got some of it at home depot for my softtop bars, not sure if they have something as thick as the rollbar but an HVAC industrial shop will for sure - looks very good once sticks on itself but you need to line up the edges carefully - you wouldn't be able to tell is not stock. fairly cheap too from what i remember, something like $7 for a 10' piece and it's charcoal colored.