twin dbw throttle body setup

Looking at running twin dbw throttle bodies on a 2x4 tunnel ram setup. So running effectively a throttle on each old carb location front and rear. Based on current knowledge If i run Haltech i need to run an O2 sensor on exhaust 4 cylinders follow the throttle which isnt ideal on a front rear tunnel ram ssetup. I really thought that both TB can run in pair and only need one master controller. It seems i would need an aftermarket controller to duplicate the actions across even tho haltech can control 2 x dbw throttle but needs them to be seperated by exhaust bank. Any other solutions to this