I bought the fundle bag.. its by far Maxie's favorite bag - he just wags his tail whenever he see its and he sleeps all the time in it when we are out.
They usually have some in the sale sections online - try this site:
Dog Carriers, Cat Carriers, Pet Carrier, Pet Slings, Fundle - Pink Puppy
I actually got it from a store in Manhattan, but the color I got wasnt on sale and I would get the mini size for the yorkie (thats what I have and its perfect.