I just bought a full seven seasons' worth of Hardy's radio show, Jeremy Hardy Speaks the Nation from AudioGo (which sells them without DRM as MP3s!), and spent a solid week in comedy heaven.
I adore the show, and have listened many times - but you should probably be aware that there are nine seasons, not seven. In fairness, AudioGo does seem to sell all nine series; I initially assumed they were missing some, to account for the ones you seemed to lack.
If you liked Jeremy Hardy Speaks To The Nation, you might also like the recent Radio 4 series from Bridget Christie and from Susan Calman, which had a similar format and sensibilities. And, as mentioned above, don't miss him on I'm Sorry, I Haven't A Clue.