OK, I've asked on abcusers. I'm trying jaabc2ps. It is a bit dated, apparently is has a few bugs, I can't see at the moment why it prints CHR to the left of the tabs, etc. but:

For you sort of purpose of tab for session tunes, I think it will probably do the job. It's on the converter now and I'll see how it works out and put off trying to see if I can adapt abcm2ps for now.

Please note, there may be typesetting differences in the score itself when using this tab output and the other output as it is running through a different conversion program.