I got one on a 7a
Not quite what your looking for but it gives you an idea.
I passed my oil lines very close to the exh pipes (insulated and heat sheilded) and expected to have trouble. So I buried a thermocouple under the insulation around each line...MAx temp I saw was 225F...Not an issue.
Give me your email and I'll send you some pics is=f you like.
Frank
RV7a