Any RC charger should do. Someone suggested that the best bet is to take it off someone who used to do RC and either upgraded their charger or is dropping out of the hobby, theres deep discounts to be found apparently.
TLP is a name I've heard around the airsoft communities so that might be a brand to look for but they run about $80-100 though.
ಠ_ಠLess QQ more Pew Pew
READY TO >> RACE