The forerunner of Anglicanorum cœtibus, and its upcoming parallel document specifically for the T.A.C., was the Pastoral Provision of 1980. To obtain quick approval of some elements of Anglican liturgy for the incoming American groups back then, selections from the 1979 U.S. B.C.P. were hastily assembled, and somehow got past the elder Marini et al. Much has changed since then, and we may hope for something more like the English Missal, with the nice bits of the various older and more classical B.C.P.'s inserted therein, to be made available as the Anglican Use of the Roman Rite.
In the meanwhile, here is one of these converted (I was going to say rebaptized) prayers now declared a part of official Catholic worship by reason of its placement at the end of the Anglicna Use Burial Service, Rite I - it is an abbreviation of a prayer of about twice the length by Jeremy Taylor, seventeenth century Anglican Divine, in his Holy Dying - which I think expresses well the urgency of all moves toward full corporate unity:
O God, whose days are without end, and whose mercies cannot be numbered: Make us, we beseech thee, deeply sensible of the shortness and uncertainty of life; and let thy Holy Spirit lead us “in holiness and righteousness all our days” (St Luke i, 75); that, when we shall have served thee in our generation, we may be gathered unto our fathers, having the testimony of a good conscience; in the communion of the Catholic Church; in the confidence of a certain faith; in the comfort of a reasonable, religious, and holy hope; in favour with thee our God; and in perfect charity with the world. All which we ask through Jesus Christ our Lord. Amen.