Hayneedle cannot be added.  We used to track Hayneedle, however, at their legal request to stop scraping their site, Sku Grid had to comply.  You can however, search for the identical items on either their Ebay Store or on Walmart's site and use the URLs from there as the supplier url, but fulfill from Hayneedle when the time comes. Be aware that if you're adding Walmart URLs where a 3rd party is shipping and selling the item on Walmart's site (such as Hayneedle), you will need to add #skuopt:all at the end of your walmart supplier url when adding it to skugrid.