So this is the cylindrical automotive coil and external points?

Its probably the same as many others, but close to London, Ontario for a supplier - you would have to be very lucky..
Scour the yards.
I too have a MF with a Briggs which I think is a replacement engine..And no generator...similar to Snapper.

Please post a pics or a link of the coils, points and condensers in the ignition system (dual or not?). Do you feel you just need to tune it up with points and condensers or clean and adjust the points in needed? loger

Joe: A replacement coil for your massey should be available . Check out E-Bay or your local Massey Dealer . If not I'll check with my Buddy in Pickford Michigan who is a Local Dealer of Massey AG and Lawn Tractor Units who could easily cross reference and ship you a unit if need be. He has been in business for over 50 yrs and has numerous older lawn tractor parts . I think you will find a unit nearby though .