Ebikes Ca of course. They are out of stock of the 2808 right now. 275 before shipping for motor only.
Clone 9c's Muxus or something else in 2807 from Amped, E-BikeKit, Emissions Free.
THE LIPO RULES. NEVER ABOVE 4.3V NEVER BELOW 2.7V DON'T PUNCTURE
Ideal charging /discharging range for Lipo, 3.65v minimum 4.1v maximum
See battery technology section, FAQ thread at the top of the page for lipo noob info.