Pogi was adorable. He reminds me alot of my Jackson, who is also 15lbs. I am so sorry for your loss. He sounded like a total sweetheart.
I, too, am looking for a second larger yorkie and what I've found... there's a ton that show up in rescue. Also, alot of times breeders will get oversized pups. Jackson was 5lbs at 8 weeks old, and I think anyone could have guessed he'd get bigger! lol. So I think once you start looking at pups, look for 4-5lb babies at 8-12 weeks old. It's not a guarantee of course. Petfinder.com is a great source.
Heres a few in NC.
http://www.petfinder.com/petdetail/16908162 http://www.petfinder.com/petdetail/17087854 http://www.petfinder.com/petdetail/16937369 http://www.petfinder.com/petdetail/17085909