You can use the Store Tag Wizard to generate the "Order" button Store Tag for any of your items.
However, if you remember the ID of the item for which you'd like to create an "Order" button Store Tag, you can add the code below to your web page, making sure to include your own item ID where indicated. If you like, you can replace "Order" with the wording of your choice (e.g., "Order Now," "Buy," "Buy Now," etc.).
Sample Order Button Store Tag:
<form method="post" action="<!--#ystore_order id="id-goes-here" -->"> <input type="submit" value="Order"> </form>
Please Note: The <form> tag must be included. If the <form> tag is omitted, your "Order" button will not function properly.