Boofhead,
As I said above, the Vmca-2 speeds with flap 1 are promulgated with respect to a 2-engined go around where you would be climbing at Vref + 60 with flap 1. The Boeing procedures do not address any other scenario with 2 engines inoperative and so I suppose that is why no other figures are published i.e. the 2-engined go-around procedure is the only case where you have to worry about Vmca.
Rgds
L