Two weeks ago, I released "Benko Repertoire" Database. Today's Database with coverage of two major Anti-Benko lines completes full Benko Repertoire for Black. Moreover, you don't need to play Benko in order to employ these variations : you can play 1.d4 Nf6 2.Nf3 c5 3.d5 b5 independently, while the second variation can occur via 1.Nf3 c5 2.c4 Nf6 3.d4 move order, so it might be an idea for your repertoire against English. Black is doing well with active position in both lines.