For a great step in harness, Chattiesmom makes wonderful ones:
http://www.yorkietalk.com/forums/yor...elections.html
My Wal-mart has some vest harnesses that are reasonable. Petco and Petsmart carry them also.
I bought a pattern that I can make some for Myah...she is so tiny yet, that I have to alter them to fit her correctly. I'm not a sewer...so they aren't the best looking, but they are getting better with practice.