Is there a commercial solution for a Power Supply Input = 400VAC input (3 phase), Output = 36VDC, 2.2kW?
They are not common. In a chassis mount unit, 2.2 kW doesn't really give much incentive to add the cost and space consumption of a three-phase front end. XP Power makes some three-phase units
Like these but not at your voltage spec.
(assuming you
need three-phase, say for avoiding unbalance on a small power system), you could perhaps connect three single-phase units so long as their outputs allow parallel operation.
From a design perspective, what topology is a fit for this requirement? Any literature is welcome.
For the front-end, PFC stage, you can use one single-phase PFC per phase if you have a neutral, a Vienna rectifier can be quite suitable (not entirely intuitive to control though) or a three-phase IGBT/MOSFET-bridge boost converter. The DCDC bulk power conversion part would probably be good with a phase-shifted bridge with probably a push-pull secondary can work well, relatively simple to design and easy to control... other approaches can be more efficient.