Where to buy Mopar performance 383 electronic ignition Kit

No need for a "kit" per-se. Figure out what ignition system you want to use, buy the parts, and install. You can get away with a factory electronic distributor, HEI module, mount and e-core coil for instance. Or a factory electronic distributor, mopar ECU box, ballast resistor and harness. Or even use a factory points distributor and pertronix kit. These are just three of MANY choices.