Latest offering available on Alibaba, reasonable specs, light-weight an legal - sub £1000 full duty paid - no try before you buy though.
http://www.aliexpress.com/item/Electric-Bicycle-Karma38-Carbon-Mountain-Bike-Pedal-Assist-Motorized-Ebike-18-L/1472646028.html
http://www.aliexpress.com/item/Electric-Bicycle-Karma38-Carbon-Mountain-Bike-Pedal-Assist-Motorized-Ebike-18-L/1472646028.html
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