Hey!
@greene you said up above that you'd "pay real money for the one with 'black' leaves; it's beautiful."
But seriously, just keep an eye out for someone with a nice big bush, and see if they'll give you a cutting. We had no trouble rooting them in Salt Lake even with the dry, dry air. My daughter moved away from that house last fall, or I'd be able to offer you cuttings from there. Hers were 10ft. tall every fall no matter how we hacked them down in the spring. Very vigorous.