What about the Rize Leisure Step?
It's a step-thru frame, and most specs seem to be in line with the Rize X (torque, brake light, etc), except the 500w motor and 48v battery and 7-speed Acera, as opposed to the X's 750w/52v and 9-speed Alivio.
I'm a fan of the company. I have two Spark Minis...