Make yer own?
Dude, if you have any ability at all with a razorblade and a soldering iron, you can do it. My kit came equiped with 30A Andersons, I bought a ton of pigtails,
www.ebikes.ca sells them, so I built a Y-connector to set each 6S pack in series. You can easily add a fuse and On/Off switch.
I'ma go get the balancing connectors from an RC providor that has 20cm extensions, Clip one end and...