I am also researching early Cole families of Oxford county - specifically Porter & Kezar Falls.
I have a great-great grandfather Levi Cole born 1830, died 1899 - he's buried in Freedom, NH. His wife was Hannah J. Estes.
His father was John Cole (b. 1801 d. 1885) married to Martha Rowe.
John's father was Levi Cole (b. 1777, d. 1855 in Porter, ME). I have Levi's wives listed as Eunice Thompson (married in 1799) and then Lydia Sawyer (married in 1822).
If anyone has any further info regarding this line of Coles, I'd appreciate hearing from you.