Well, here's what audio I got from Toshihiki Seki-san panel. Please remember, I got this with my old camera, so the quality isn't that great. Enjoy!
Audio Files Multiply stream
Audio files download
He was wearing a Momotaros shirt that day. Since I sat like 4 rows from the front center, my camera wasn't good enough to capture that shot. And there was no personal photo allowed, out of courtesy. So if I can find a good quality picture of that shot, I'll post it.
And this is what I got from AX.