unfortunately to buy a premade connector you are out of luck. I looked into this awhile back, and the response I got from two manufacturers is that they were willing to tell me how to do it, but were not willing to make one do to liability issues. They recommended instead buying the Hyperion Duo charger.
I think this is really going start coming to a head as more people go with a 2 pack setup in there vehicles. Hopefully companies will push more chargers that can do 2 packs at once that don't break the bank. The Duo isn't exactly cheap, albeit, one heck of a charger.
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