Well, some manufacturers give that info, others don't, which I take as the L/G DOWN performance not being required by any certification or operation regulations.
Basically you are on your own. My opinion is that there is no problem whatsoever unless you are in a challenging airfield, like I mentioned (BOG in a hot day and the airplane full to the brim). In that case I would feel scared and I would try to stay in the lower terrain area, climbing like a vulture if need be. For that, a special engine out procedure is as adequate as any other option (like visually climbing like a vulture).
In non challenging airports I wouldn't care much, my airplane climbs like a rocket with two engines.