I have had a company called Looper Leather make up some 45 ACP moonclip holders for duty use. I haven't got them in hand yet, but I expect to have them next week. I sent Looper 2 loaded MC's and they made up the duty gear for me and my Chief Deputy.
If you are looking for something like that, I suggest contacting Lisa Looper and talking to her. looperlawenforcement.com
Tell her the Oconee County GA Sheriff sent you