hi dknguyen,
The RM7,8 and 10, ferrite transformers work well at these frequencies.
They can easily be wound for 12Vac to 200Aac step up.
Measure about 15mm thru 25mm dia.
I have used them for acoustic sonar from 33KHz thru 210KHz, square wave driven, tuned to resonant with the ceramic transducer.
Power 5Watts thru 100Watts, pulsed 100uSec thru 3mSec at 10pps.
Get the RM transformer data sheet.
EricG
EDIT:
If you don't want to wind all 10 txrs, design 1, test wind it, then look thru the trade catalogs for a local prototype coil winder.
Its not to expensive for 10 off.