Hello and welcome to YT. I am sorry about the loss of your two babies. I know that is very hard to deal with. I bought Jack from a store (actually a puppy broker and didn't realize at the time they were associated with puppymills). So I would never give out that information, although Jack, fortunately for us, so far has been very healthy.
Izzy we bought from one of the breeders here, Brenda of Greens Treasured Yorkies. Her website is
Home - Greens Treasured Yorkies. I can see the differences between our two and see how well socialized Izzy over Jack. If I were to get another Yorkie, I would definitely call upon Brenda again. She was wonderful to work with and I do believe she will ship her puppies (actually they are sent with a courier and hand delivered). She is located in Michigan and we were able to drive to her and pick up Izzy from her.
Good luck in your search.