Amazon, yeah its a nb power kit. Ive got a 29er and its the only one I could find selling that size of a motor on a 29 inch rim. Ill share the link.

135mm Dropout 72V 2000W Rear Wheel Motor, 70-75km/h 2000W Electric Bike Kit,Electric Bicycle Conversion Kit with Mutifunction SW900 Display,72V 45A sine Wave Controller, with 7 Speed flywheel https://www.amazon.com/dp/B07S1QSW8H/ref=cm_sw_r_cp_api_glt_fabc_MSR7QTXQVYMQW1GHG6T5