Sodium Bisulfite is known to be a preservative of metol (it's in part A PMK Pyro) and of hydroquinone (it's used in certain skin lightening creams for this purpose).
So if the metol and hydroquinone was dissolved in sodium bisulfite solution to make part A and the other ingredients in part B in theory a long lasting two part D-76 looks possible to me.
But AFAIK nobody ever did the calculations and experimentation that would be needed.