Sam Rivers Live at Tut's Chicago 1981

An audience recording of Sam River's live February 10, 1981 performance with an electric quartet:
Sam Rivers (ts, ss, fl, p)
Jerry Byrd (el-g)
Skip "Crumby" Bey (el-b)
Steve Ellington (dr)
I got this from the now defunct Huppes blog. According to the Sam Rivers sessionography there's a longer 90 minute version out there.