[balinor]

Well you can't copy it directly, as the code for the product page and the products pages are different. A simple way is to just add this bit of code which will display an in-stock or out of stock message:

{if $products[product].avail le 0}Out of Stock{else}In Stock{/if}

You can use the same {if} statement to hide the price or buy now button as well.