Bryan,
Jim is the only one who creates the fish for copyright and several other reasons. I know how you feel though. Morgan and I both have fish that we would love to see, but it probably isn't going to happen for one reason or the other. Morgan's is the Red Sea Sailfin Tang, and mine is the Long Finned Batfish.
You are more than welcome to add your requests to the wishlist topic here on the forum. Jim looks over all of them and considers them carefully for inclusion in the aquarium. We do have a wishlist photo page located here
https://www.feldoncentral.com/Sachs/wishlist.html this page will let you see more about what is planned, both in fish and invertebrates. You can also see what features are scheduled for inclusion in the program. If you have some different ones that you would like to see, post the names on the Wishlist forum Topic, and we will try to add them to the photo page.