Slim, Avon had no drug connect in NY. It was lost in season 1 and confirmed in season 2 when Stringer met w/ ol boy's lawyer and he told him in a around about way that they wasn't fuckn w/ them no more.
I think you coming to this "Avon reestablishing his NY drug connect" cause he mumbled about the "Prop Joe package(pause)" when Brother met up w/ him at the barber shop. That was just Avon thinking out loud at how him, Stringer, & Brother Mouzone got to that point.
Remember in the scene where Stringer come cleans about D'Angelo, it starts off w/ String being mad at escalating war between Marlo & Avon. And Prop Joe threatening to cut them out, if Avon still had any NY drug connect he most likely would have had it reestablished when he got out. But he didn't cuz there was no NY connect to be had.