Sounds very interesting.
I have been toying with a similar idea for a long time, but now that you graciously offer to do the research work , you are welcome!!
I have more modest ambitions, would just love to turn some of all those PC supplies that get junked every day into stiff +/-40V supplies for my 100W SS amps. At least in theory, they should do fine.
Keep us informed.
PS: I guess you will feed 6 or 12 VDC to those filaments, not 100KHz squarewaves