Small hub motor for Downtube Nova 20" folder

[YoSamES]

I am looking to put a 250 to 350 watt 36v geared hub motor on a Downtube Nova 20" folding bike. It has a fairly skinny steel fork, and might have an aluminum frame, with 135mm rear hub. I have not verified that but let's say it's aluminum. Since the bike weighs 24 lbs, I would think that is the case. (I don't have the bike yet.) I have a small battery in a soft bag which will hang where it says Downtube on the main tube.

http://www.downtube.com/Downtube-Nova-Lightweight-Folding-Bike-p/nova.htm

15 MPH top speed is fine.
I'd rather have extra grunt than extra top speed.
I'd like to buy a wheel already laced with the motor. If not, I'll have to source someone to do it. Which can be done, I'm sure.
Brakes will be rim brakes.
I would pay extra within reason to get it from a US or Canadian supplier.
I would need a controller, throttle, brake levers, the usual stuff. No PAS, I don't think.

Would the forks hold up to a front motor with torque arms?
Or would a rear motor be better? I have a front hub 26 incher, and also a rear hub one. The front hub can be a very minor annoyance, but for my riding style it's not a big deal. Simpler and easier is better, as long as it's secure.

So given all that... who, what, where, how?
Thanks.

 

[mark5]

A couple of references to the Downtube Nova seen here before. They're more than the small hub motor you ask for but I hope could lead to useful ideas.

mwkeefer's comments on the Downtube Nova
http://endless-sphere.com/forums/viewtopic.php?f=3&t=54889#p818772

Downtube Nova Mac 7t electric hub commuter eBike by Toan Ngo
https://www.youtube.com/watch?v=HtTJsSwXxt0

 

[YoSamES]

Thank you.

 

[DemoTokamakSharma]

Motor design should be important for the future. New electric motors can change manufacturing and construction after the electric revolution.