We have talked with Wallbuys and we setted up a GB page on theire website to buy this battery per $12.80 each pair. If you are interested go to: http://www.forolinternas.com/viewtopic.php?f=51&t=6967
the groub buy is active, live!!
That is a very cheap price! Although I bought some of the flat top versions in last weeks group buy so I am out on this one.