Do you mean you haven't heard their early singles? I don't have the CD's + DVD box set, but if memory is right, I think they didn't have any great tunes on B-sides except both cover versions of Syd Barrett's "Vegetable man" and the Subway Sect's "Ambition".
And I think early JAMC weren't a great live band. Actually I have a bootleg of their ealy live, I have played it few times, haha. But you may found some good tunes, so I donno.
BTW, have you heard the Saints? I can recommend their CD box set "All Times Through Paradise"!
Jim Reid is a big fan of the Saints!
Also, early Subway Sect's tunes are great, too! If you didn't know.