4s lipo?

[sime46]

Hi all. Recently bought an LRP S8BXe with LRP motor and speedo(not the rtr). Ive had a blast or 2 with it with a pair of LRP 5300 28c lipo's and its rapid. However, I read on here that the best way to go is to run a single pack. I was lookin at the Hyperion vx g3 5500mah. Can these be bought from the uk or can anyone reccomend an equivelant pack that can be purchased in this country? I cant be bothered with importing stuff like that. If its sourced here at least if something is wrong, I'll have an easier time sorting it out. Thanks.