I see this file that appears to be the last one, but the rest, no:
C:\ProgramData\Adobe\CameraRaw\LensProfiles\1.0\Canon\Canon EOS 5D Mark II (Canon EF 70-200mm f2.8L IS II USM) - RAW.lcp
I don’t think the Extenders are profilable since they are used in conjunction with other lenses where the combination would need to be profiled not just the extenders, themselves.
You are correct, having a profile of the extenders does not make sense. What I should have said is having profiles of the nee super telephotos and the extenders with the new/old super telephotos.