I have a really tiny yorkie puppy at the moment and I am looking for a tiny harness I can buy for the time being. When she gets older, I am going to get one made for her, but I really don't need that now. We live in a very busy area and I'm just worried about her getting away. Our local pet store carries a xx-small, but its still too big

We have a ferret collar for her, but thats still too big and I wouldn't ever walk her on it.
I posted on the products wanted ad, but I'm getting a little desperate!
If you have any suggestions, PLEASE let me know!
Thanks!