Plug boots Burning TTI Headers

I was wondering what the guys that are running TTI headers on your small block have done to keep from burning boots? Here are my #5 & #7 boots on my 408 small block,
20210919_203057.jpg
I only have about 500 miles on the motor and I am using these DEI Titanium boot protectors from first startup. These are supposed to be good to 1800*.
16320989082271617210029983053267.jpg
I didnt know if there is some type of metal guard that would go between the header and insulator but there has to be something better.
Thanks
Rod