If you are talking about the meat filled pastry then Kell's in post alley has them.

If you just want the plane flesh colored flower shaped nipple coverers so as to avoid a "wardrobe malfunction" a la Janet Jackson, you can get them at Macy's and Nordstrom.

twirlygirl.com

The ones here are pretty awesome and well made (and you get a trading card!!).

http://www.etsy.com/shop.php?user_id=5605145

(Also, since they're in Canada they have to declare what's in the package, which is pretty amusing.)

I second the twirlygirl.net recommendation! They're made by the local and fabulous Miss Indigo Blue.

Le Frock on Capitol Hill.

Here's another great Etsy shop (though I can't speak personally to the quality of the products): http://www.etsy.com/shop.php?user_id=5160005 I've been dying for an excuse to get the peacock feather ones.

Sometimes VAIN has fun ones in stock.

Tasty Pasties will be at the Fremont Fair this weekend.

I was so excited thinking you meant the meat filled pastries - cheers for the Kells tip. The English Pantry in redmond has them as well.

Erotic Bakery in Wallingford - plus they're edible.

www.honeybeeblossom.com

These pasties are hand made by a fellow seattle-ite.
Options also available for custom design and matching accessories. Very cool!

The Triple Door was selling a wide variety of them when we went to see Burlesque Alice in Wonderland a few months ago. Call and ask, but I bet they sell them during their regular burlesque shows.

Who would have thought that SO many people had an idea of where to buy pastie??!!

I remember when they were outlawed in my beloved state of Michigan.

It was ruled that Adult dancers were not nude if they were wearing these.

Instantly, signs sprung up all over the place, proclaiming "Pasties".

Unfortunately for the upper peninsula, there is also a meat dish called a "Pastie" and THAT's what was being advertised.

Whatever works. Once they got the rube under the big top, they stayed for the show...

gothfox.com