Before I had the CES headers I had a set of Sam's Thug headers they were Stainless and Ceramic coated with twin layer Heat shields Sam only supplied the heat shield for the Thug header and the Predators because the pipes were mainly straight and even he said that making the heat shield were a pain in the arse to make so I can understand these other system makers not wanting to make them as as the heat shield would cause a Dramatic rise in Price .... would you be prepared to pay an extra $500 + (only a guess as they would be very much time consuming to make them follow the lines of the headers.
Do these look familiar Hans?
One of the reasons I like these headers so much is because of the amount of work that has gone into the shields - making them almost look like they could be factory pipes. As you can see making the shields for this system would have been very time consuming indeed. I still owe you a beer or two regarding these mate.
I think the best solution for the OP would be to finish off any other engine related mods which he may want to do, use a Hanso tune to run safely until he can get to a good dyno operator for a proper tune. I know the tune Hanso gave me was very safe (in reference to lean/rich - rich being safe). If it were me I would make sure I have a new fuel filter installed and a full tank of the fuel I USUALLY run - nothing exotic before heading to the tuner. No point tuning your engine on a fuel you never use or have trouble accessing.
I find it hard to see any positive gain exhaust heat or otherwise in switching to a low octane fuel. There will be negligible difference in exhaust temp on any given standard machine going from say 98 to 95 with no other changes. Certainly not the difference between a leg which is well done to a leg which is medium rare. The reason we use higher octanes is not generally heat related but it's resistance to pinging which allows us to do lots of fun things like cram more air (and fuel) in, and increase the timing. Of course alcohol is a different matter but doesn't really apply here.
I have found, as I'm sure many of us have is that one of the best value for dollar for mods is a good dyno tune. Not only in the peak figures but in the delivery. Even on something just rolled off the showroom floor, if I recall correctly there is a thread on here somewhere where Neville had great gains on a dead stock brand new Rocket.
Super D if you get your bike tuned you at least remove that variable possibly solving your issue, and get an almost guaranteed performance increase as well. Aside from that well, the heat is just normal and you may need to shield yourself.