Go to Uniglobe. Follow thru as if you were going to purchase a cruise. You can find out number of cabins left in each category except that it only gives you the 7 best of each cat. You can put in individual cabin numbers to check all but that is too time consuming. As long as you remember that mid sells before aft before fore, you can get a good idea of how the ship is selling.
All on line booking engines that have real time inventory will show the best 6 or 7 available cabins and whether or not a guarantee is available in a particular cabin. Remaining cabin itinerary is privileged commercial information that is not available outside of the cruise line itself. There is no location where you can find it.