Hi. You may want to try
www.petfinder.com. Since you are looking for a an older pup this may work out for you, especially if you'd consider maybe a 2 yr. old. I've seen quite a few little ones on Petfinder where the rescues were looking for experienced Yorkie owners. I'm not sure about 2 lbs. Wow that's tiny. My lilly is full grown at 3 lbs. and let me tell you she's tiny and by the way she was a rescue. We got her at 13 weeks. The rescue had over 100 applications on her but wanted her in a home that was Yorkie experienced. Best of luck to you. Elaine