It would be interesting to find out how much bleed air a windmilling engine produces. If it is producing enough pressure to open the required valves, then closing the outflow valve more should assist in maintaining cabin pressure.
Sweet f*** all unfortunately. There isn't even enough air to operate the bleed air regulator & PRSOVs on the engine.
Throw the O2 on get the plane safe. Let the back have a little hypoxic-induced sleep whilst ya fly her down (I suspect it'll be coming down pretty good on it's own with a simultaneous dual engine failure).