Oracle doesn't permit us to redistribute any java patch versions such as the non-public ones you mention. I received a specific reminder on this about a month ago personally.
If you were able to obtain the patch versions you mention, you are correct in that it would be included/covered in the range of versions we consider supported for use though.
So unfortunately as you quoted, unless you are an Oracle customer with those entitlements, then for that version of Clarity, you would not (in any normal way) be able to obtain a higher patch level than the public ones available - it has been controlled that way on purpose (because Oracle are not willing to 'maintain' Java 1.7 for free anymore, and those fixes would only freely be available in higher versions that are still publicly maintained).
Ultimately in order to keep up at this point, I think it is likely going to require upgrading Clarity itself so you can get to the versions where we've moved on from Java 1.7.x and are now going for Java 1.8.x and beyond.