I think I've exhausted my search on Google and the archives for this list.
I have an ISP that does SpamAssassin for my email, which then I download via POP3.
Can you control your own userprefs file on the ISP? If so, add the score as part of the "subject rewrite" rule [or whatever it's called nowadays] Then your messages come up something like this:
[spam:50.02] buy drugz now [spam:15.35] buy body enhancements [spam:06.26] buy my book
and so on.