Got reply to my email.
USA distributor -
http://www.gazelle.us.com/Balance Innergy $3,499.00
Back to
http://www.choppersus.com/store/20" ChoppersU.S. Youth Cruiser $300

Putting a hub motor on the front or back should be doable. I see issues with the brakes. Chopper only has a rear coaster brake. I don't see any place to attach a front calliper brake. Since seat will be low rider could assist the inadequate brakes with shoe leather.
Sheldon Brown says:
If you put you foot down while the bike is still moving along, here's what happens: You're already slowing down with the brakes, and the brakes are slowing the entire bike/rider unit. If you put a foot down and transfer your weight to it, the brake then only needs to slow the bicycle, which is much lighter than you. The amount of braking force that was slowing the bike and rider at a controllable rate will be sufficient to bring the bicycle alone to an abrupt halt. Meanwhile, your body's momentum keeps you in motion, until you whack a delicate part of your body on the handlebar stem of your suddenly stopped bicycle...ouch!
Here's one from K-mart

Micargi Dark Blue Jaos Beach Cruiser $364
I sent a email to
http://micargi-china.com asking where to buy Jaos 3.0

Jaos 3.0
Frame: Micargi Chopper Oversized Hi-Ten Steel
Size: 13"
Fork: Triple Tree Fork Alloy Crown Hi-Ten Steel Chrome Legs
Crankset: One Piece Steel Chrome Chainrings 44T
Freewheel: Sprocket 22T
Chains: Heavy Duty Silver/Black
Brake Coaster Brakes
Handle Bars: Hi-Ten Steel Chrome Hi Rise 15"
Stem: Alloy Silver Piston
Seat post: Steel Chrome
Hubs: Coaster Brakes Black 68H
Spokes: Steel Black 14G
Rims: Alloy Red Front/Rear 24"X3.3" 68h
Tires: Front/Rear 24"X3.0" Flame Thread Black
Will front and rear calliper brakes fit on this bike?
Any other Chopper? Crank Forward? Beach Cruiser? Low Seat bikes for sale?