Third Wife for Joseph II?

If Joseph II, The Holy Emperor had decided to marry for a third time after the death of Maria Josepha of Bavaria, who might he have selected as his third bride?
 
If Joseph II, The Holy Emperor had decided to marry for a third time after the death of Maria Josepha of Bavaria, who might he have selected as his third bride?
Maria Benedita of Portugal, youngest daughter of José I of Portugal. OTL, everything was prepared for her to sail to present-day Belgium to marry Josef (they even had a ship built especially for the occasion of conveying her thence), when he said no.
Otherwise, he supposedly showed a vague interest in Élisabeth de France or Maria Elisabeth of Saxony.
 
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