Yes, I was running the 21.5 on 2 cell lipo. The Gstyle torque motors are insane!
If you click on this link, you can find motors offered with 14.0 rotors. I'm not to sure if you can have them shipped out of country.
http://www.team-gs.jp/shop/50.html
http://www.team-trion.com/products/index.html Trion is another motor company that's just as good.
You'll have to do a little research and see if they will ship out of country.