I searched near and narrow, far and wide, and nary a shop had a 4s inside.
Befuddled I muddled, "what the hell?" The most popular voltage is clearly 4 cell.
My quest for your pack has ended in blunder, there might be a shop that has one. (down under)
You don't want to ship from an aussie. (fair enough blokes) But the price would be costly.
Now what on earth is magman to do? Might I suggest, you try a neu?
It's not quite as big as the size of yours, but 300mah can be ignored.
Neu batteries are powerful, reliable and nice. As good as hyperion without the price.
With the money saved, spread some christmas cheer, love on the wife and grab yourself a beer.
Merry Christmas magman
Neu 6200mah 35c 4s >
http://www.neumotors.com/store/page12/index.html