Hello, I'm building a small DC circuit that takes a car battery and turns it into a high voltage, low amp pulse. It has a couple transformers in it that I am having trouble finding or finding parts for. One is a simple step up that would take a 22A, 300 V signal and convert to 220mA, 30000V. The other is really fancy, it involves a "standard half-cup ferrite core 36/22-341" and a "coil former 4322-021-30390." The secondary coil is center tapped, 380 turns. It has three primaries; two are wound together 9 turns, one is 4 turns and center tapped. I did find some 30guage enamel wire, but I'm not sure if I could use a toroid core or some other kind. Any suggestions for sources or substitutions?