Sorry, but what you said about why a "morkie" is the dog for you is what threw me off and I suppose upset me a bit so I gave you a response that fit my attitude. Plus it annoys me that people breed mutts when the animal shelters are so overpopulated with mutts and even purebreeds because people didn't like how long it takes to potty train them, or because their apartment "suddenly" decided dogs are not allowed or because they realized that they "don't have the time required to raise a puppy" Again I apologize for that, you situation sounds great for a new puppy, however again I say, because you are getting a mutt you can't predict which traits the puppy will pull from which breed. During your extensive research you should have read that somewhere.
You may find your "breeder" that has "morkies" and the pup will be happy and healthy and will be a perfect fit...until about a week later when they are used to the atmosphere and the "Yorkshire Terror" comes out of them
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When you meet up with this "breeder" just be sure to meet and play with both parents as well, from there you should get a good feel for their temperment and that could be an indicator of how your puppy will be when it gets older.
Unfortunatly I do not know of any reputable breeders that breed for mutts, but you can always check with your local shelter and see what they have that may not have been posted up yet because they have been recently dropped off, or a yorkie or maltese rescue may have the perfect little "morkie" for you. I still recommend adopting an adult so you can aviod getting a puppy that winds up resembling a yorkie in all but coat.
Rescue Me Yorkie Rescue Find a Maltese Dog Rescue http://www.greatdogsite.com/hybrids/details/Morkie/