This tip just came in from Suni (an avid 2Peas reader): Heidi Swapp 567 piece embellishment kits are now available at the Costco in Frederick, MD. They're only $29.99, which is an amazing deal.
Apparently it can be found (at the Frederick Costco) on the side with the optical lab, near the mattresses. I might have to make a quick trip this week!
The Arundel Mills, MD Costco is also carrying this product.
Added 7/24/06 - My friend Jeanette found and purchased a Heidi Swapp embellishment kit at the Costco in Manassas yesterday. They were down the aisle where the toner cartridges and office supplies are located.