I have a wonderful big bush April Reign lepidote rhododendron, which is always the FIRST to bloom, and has a lovely lavender tone to the basic lilacy-rosey. I got it decades ago from Carlson's but they aren't selling it currently,; they certainly should; it's one of my very favorites.
Azalea nurseries should get cuttings from me. I have no idea how to take cuttings,; maybe someone would instruct me.
April Reign earliest lepidote rhododenron
This info http://davesgarden.com/community/forums/t/1307232/?hl=azalea+cuttings might help answer your questions.