This concert was engineered into a live album I really enjoyed back in the day. For some reason the Apple folks have chosen not to re-release it. Some Christmas season or other, I suppose it will emerge.
In the meantime, thanks to the copyright-finessing magic of YouTube, we've got this video, which is sonically inferior to that now-rare LP, but still great, supercharged fun. They were a great live band, the Fabs.