I mean, it’s like I hear the silent cry for help from the Holy Souls in purgatory:
“Hey, what about us! What about a mention in the Emergency Chaplet of the Immaculate Conception? Aren’t we an emergency all the time? Hey!”
I agree. But what to do?
I remember that for all the many sets of years I was resident at the Convitto Internazionale San Tommaso adjacent to the Angelicum (regardless of which university or Institute I was attending for studies), the post-lunch thanksgiving prayer was the usual Agimus tibi gratias…, which was then concluded, to the point, with:
Fidelium animae per misericordiam Dei requiescant in pace. Amen (May the souls of the faithful departed, through the mercy of God, rest in peace. Amen).
And, I mean, I do offer the chaplet for the repose of the souls of the faithful departed, that is, a lot! So, I mean…
Just another suggestion to think about…
Accompany me, Father George David Byers, S.S.L., S.T.D., as I begin life as a Catholic Priest-Hermit by choice. Holy Souls Hermitage is dedicated to the sanctification of my fellow priests, bishops, deacons & seminarians going through the purgatory of this life or the next. Prayer and sacrifice go up, of course, for both Benedict XVI and the next Successor of Saint Peter. 
Dear Fr George,
I prayed the emergency chaplet not one hour ago and, after the prayer to St Michael (x2) I concluded with St Gertrude’s prayer for the Holy Souls. Half an hour later I saw your post. How’s that for confirmation! However, I do think the briefer prayer you suggest is in keeping with the keep it simple principle.
Hello Bernadette: What’s that prayer of Saint Gertrude again? I’m sorry. I’m just so very distracted in these days.
PRAYER OF ST. GERTRUDE THE GREAT: “Eternal Father, I offer You the most precious blood of thy Divine Son, Jesus, in union with the Masses said throughout the world today, for all the Holy Souls in Purgatory, for sinners everywhere, for sinners in the universal church, for those in my own home and in my family. Amen.”