One of my favorites is Yorkie Splash and Shine.
Yorkie Splash and Yorkie Shine | Yorkie Shampoo and Yorkie Conditioner
I love IV San Bernard Black Passion. However, with your pup being so young I am not sure if these are ok. My youngest pup was 6 months when I got her. So I never went through the puppy stage. Also I use Pantene and Matrix conditioners. Just don't use human shampoos on them. Hopefully someone with more experience with young pups can tell you what's ok and what's not. Good luck on your search!