The only way I know of to prevent the roll over when you get below VMC is to reduce the power on the operating engine RFN.
With both engines out, a reduced airspeed lower energy emergency landing can be achieved in your new glider.
1.1 VSO for 50 foot ref, slowing even more if ground effect can be used to slow down in ground effect where the stall speed is reduced. Although this would require excellent skills beyond that would elude the four landings a month crews. Those guys should continue to fly it on to the chosen landing area/spot.