I still pray for Unity using this from the 1957 Benziger Brothers Raccolta

 

O Mary, Mother of mercy and Refuge of sinners,
we beseech thee, be pleased to look with pitful eyes
upon poor heretics and schismatics.
Thou who art the Seat of Wisdom,
enlighten the minds that are miserably enfolded
in the darkness of ignorance and sin,
that they may clearly know that the Holy Catholic
and Apostolic Roman Church is the one true Church
of Jesus Christ, ourside of which neither holiness
nor salvation can be found.
Finish the work of their conversion
by obtaining for them the grace
to accept all the truths of our Holy Faith,
and to submit themselves to the supreme Roman Pontiff,
the Vicar of Jesus Christ on earth;
that so, being united with us
in the sweet chains of divine charity,
there may soon be only one fold
under the same one shepherd; and may we all,
O glorious Virgin, sing forever with exultation;
Rejoice, O Virgin Mary, thou only hast destroyed
all heresies in the whole world. Amen.

I understand that Ecumenism, the Universal Solvent of Tradition, required a new theology and new prayers and, thus, the harsh truth of this prayer was submitted to the sacramental of defenestration.