The thought has occurred to me, also in context of say hi-fi audio, where there's no shortage of enormous (often toroidal) transformers with terrible, terrible capacity -- because they love to use them with even more enormous capacitors, on the assumption that that's better for bass capacity, or the reduced ripple helps, or something. So the power factor is abominable, like 0.2 or something.
You know, audiophile stuff, it doesn't need explanation, it just is...
So, there might even be a small but useful market for such things. It'll be a while before I have time to dedicate to play with such a circuit, though.
If nothing else, you can take an off-the-shelf eval kit, and scale all the power-facing components appropriately. L down, R down, C up. If the inductors have taps/windings, adjust ratios accordingly. Pick appropriate transistors and diodes. Everything done to ratio, the controller doesn't even know anything has changed (think in terms of invariants like this: it's a very useful approach in general!). Assuming the controller doesn't need high voltage itself, of course (so, avoid the self-starting types, I guess).
You won't be able to run much higher current than the board was designed for, of course -- PCB tracks aren't scaling here, obviously! But you'll get roughly the same dynamics (e.g. switching loop stray inductance giving same peak voltage, if dI/dt is the same and Coss isn't much higher), so that might be handy too.
Tim