To-day is the feast of the Holy Apostles Simon and Jude; the Anglicans have a most pertinent prayer for this day (based on Eph. ii, 20-21 & iv, 3; I Pet. ii, 5 & iii, 8), which I suggest should be prayed for the coming reception of their faithful remnant into communion with the Apostolic See:
O ALMIGHTY God, who hast built thy Church upon the foundation of the Apostles and Prophets, Jesus Christ himself being the head corner-stone ; Grant us so to be joined together in unity of spirit by their doctrine, that we may be made an holy temple acceptable unto thee ; through Jesus Christ our Lord. Amen.
(This is the official Collect of the Prayer Book Society.)
In the Catholic Anglican Use Book of Divine Worship, this Collect is appointed for use on the Sunday closest to the 29th of June - for obvious reasons...