For a 5 way ganged 6 amp charger, see the LS1206 at
https://www.batteryweb.com/interacter_specs.cfm
And click on the ganged charger link. The company
gangs the guts of 5 of the chargers you select.
We have one of these with 5 LS1206 six amp chargers in it.
Charger performance has been excellent.
Eugene