Your best bet it to put a watch on eBay for a "spares or repair" camera of the same model but with a different fault. It should then be possible to swap out the flash module. You can practice disassembly on the one from eBay before attempting yours.
BUT: make sure you understand the danger from the flash capacitor and how to avoid it - this can hold a charge at a dangerous voltage for many hours, or even days, after being switched off.