I have some blue polos that I am selling here:
http://www.yorkietalk.com/forums/yor...me-summer.html
But they aren't Navy, more of a Royal Blue and the buttons are in the front (which is what I prefer).
You should be able to find some several places on the net if you Google Blue Dog Polo.
blue dog polo - Google Search
Good luck! Can't wait to see the finished product.