Polymorph effect that allows every EX ability

[Redcap's Corner]

Is it possible to set the polymorph gizmo up to allow every Extraordinary ability a creature possesses? I've gotten as far as:

foreach pick in gizmo where "HasAbility.?"
  if (eachpick.tagis[AbilType.Extra] <> 0] then

But then I can't think of a way to convert the HasAbility tag to the corresponding PolyAllow tag for assignment to the adjustment.