It is like a white whale

I've been through the boost thing quite a bit, about 100 pages back, it isn't your friend. It is probably going to disappear from hybrids once they figure out that they sell cells that can hold more than 1.2 volts.
edit: or they simply switch the motor vhz rating on the fly, a-la series-parallel/wye/delta/phase groupings/etc. I would trade no inductors for more switches if circumstance called for it.