Sorry for your loss. We went thru that last July. Took us almost 6 mos to be ready for another Yorkie.
We decided that we wanted a rescue. 2-3 mos of scouring petfinder.com (nationwide shelter listings) paid off by finding Andy. We love him dearly!
http://www.petfinder.com/petdetail/17942383 http://www.petfinder.com/petdetail/21992641