Well, I think I found an ebike with parts that could be compatible, one option might be to buy replacement parts for the bike online, but there are still 4 things that concern me. Here, this is from the highway traffic act in my area:
"power-assisted bicycle" means a vehicle that
(a) has a handlebar for steering and pedals,
(b) is designed to travel on not more than three wheels in contact with the ground,
(c) can be propelled by muscle power applied to the pedals,
(d) has an electric motor but no other type of motor,
(i) the motor has a continuous power output rating, measured at its shaft, of 500 W or less,
(ii) if engaged by the driver applying muscle power to the pedals, the motor immediately stops providing the vehicle with motive power when the driver stops applying muscle power,
(iii) if engaged by a throttle, the motor immediately stops providing the vehicle with motive power when the driver activates a brake, and
(iv) the motor cannot provide the vehicle with motive power when it is travelling at more than 32 km/h, and
(e) [repealed] S.M. 2021, c. 30, s. 16,
(f) has either
(i) a mechanism to turn the electric motor on and off that can be operated by the driver, and if the vehicle has a throttle, or is separate from the throttle,
(ii) a mechanism that prevents the motor from engaging until the vehicle is travelling at 3 km/h or more; (« bicyclette assistée »)
Things I don't know:
If engaged by the driver applying muscle power to the pedals, does the motor immediately stop providing the vehicle with motive power when the driver stops applying muscle power?
If engaged by a throttle, does the motor immediately stop providing the vehicle with motive power when the driver activates a brake?
Does the vehicle have a mechanism to turn the electric motor on and off that can be operated by the driver? (I could probably fashion something for that)
Does the vehicle have a mechanism that prevents the motor from engaging until the vehicle is travelling at 3 km/h or more?
Since this is an ebike forum, perhaps someone here can cross a few of these questions off my list? I have an amazon link here showing the bike with the engine in question: