For ordering new product directly off the production line, Rodgers Chevrolet is the Nationwide preferred dealer for anything Chevy for the Camaro5/6 community.
If you want to hand pick and order your own custom vehicle directly from Chevy, you can reach Becky via PM ->
Becky@RodgersChevrolet.
If you are not ordering brand new from the factory, you can certainly check with Becky for current inventory, though there is no guarantee she can find what you specifically want in stock. Even if she can, she would have to ship it to you between dealers (mind boggling nightmare) which is why I suggested you should find a local dealer to work with. Becky can drop ship to you directly from the production line, but you're not likely to source "Aged inventory" from out of state.
Currently, they do not have any 2SS' listed in public inventory, Becky will simply build whatever you want.