Since the product page for a product that we already own grays out the "Add to cart" button, would it be possible to provide some more information:
- You purchased this product on {date}
- Make that text a link to the actual order
I know this would be challenging when the product was part of a base package. At present, though, it's very difficult to go from a grayed out product page to the specifics of when we ordered it or how we ended up with the product. And I tag all my resources when they arrive... 
Not a huge issue, but it's worth asking.
Thanks,
Donnie