I have some 1 ohm, 2.3 ohm and 5 ohm resistors flame (retardent) on hand (u use 1.5ohms?)....is that good enough for the gate resistors? I also have some ferrite beads I could use, they're rated @ 500mA but i could parallel them if required, although the duty cycle is only around 1-2%.
I am mounting the Fets on an aluminium finned heatsink 120mm square with a 120mm fan forced air cooling on the fins. The drain/tab of the devices can be bolted to he heatsink and I can attach a 4 awg lug output to the heatsink. The switching current can pulse to several hundred amps.