All the surnames you mentioned are recorded in this book under all categories.
The Anglo-Protestants of Megantic County, repertory of births, marriages, and burials, 1826-1991. under the supervision of Paul Vachon.
Socie'te' ge'ne'alogigue de la re'gion de l'Amiante
671, boul. Smith sud
Thetford Mines, G6G 1N1
a/s Andre' Gamanche, Le'andre Pomerleau or Paul Vachon
Phone: (418) 338-8591 (be prepared for French or French accent)
I purchased my copy over 10 years ago for $50-$60. I know the price has gone up since then, but don't know the current cost.