I was going to say, I thought diamond had a list. Several other sites do, too. He must not have looked very hard. Just as well that you now have it on your site. The more all purpose your website is the better your business is. Guess you know that, already.
The only problem with the Diamond customer site is that they put all of the "scheduled" to ship items on the list and do not update when things get pushed back. This list is an internal one that shows things that are in the warehouse and are being sent out. So it is much more accurate.