cast crank 383/440 flywheels

couple of questions:

can you get a balance plate so that you can use a neutral balance flywheel on a cast crank motor? I've seen them for 383 Chevys so that you can use a 350 flywheel but don't know if they're availible for Mopars

are cast crank 383s the same amount of imbalance as 400s and cast crank 383s?

finally does anyone have a flywheel for a cast crank 383 they want to sell?

thanks