Jeff has been the Sunday night host of
The Avant Ghetto for several years. At one time, one hour of the three hour program was dedicated to Grateful Dead bootlegs. His show was the first place I heard, Wet Tuna. Jeff occasionally plays unreleased stuff Matt gives him.
The Avant Ghetto is on WFMU and they have an app that allows you to listen live or DL previous shows within the app for playback offline.
I’ve ordered a few of the updates : )