Yes, melaniatic pheasants can have really full neck, parcial neck or just a few spots of feathers or no ring. And can be different shades of melanistic.
To me it looks like a Platinum or a Dilute Ringnecked. James Pfarr is the world's foremost authority of True Pheasants.
Yes, they are available in the U.S. ....I raise both!!!! So do a few other peeps.