It's suspected that Colt actually MADE the Commands in one run in '42-'43 and shipped from this stock until the end of the war.
In any case, the Commando WAS just an Official Police, so it would be no problem to turn some out as needed.
For holsters, any holster that will fit the OLD model Trooper, or even the Python should fit fine, as long as it's not one that have very close, intricate molding around the barrel.
For a military holster, originals can often be found on Ebay.
For new-made replicas, check out the offerings from:
Pacific Canvas & Leather
P.O. Box 291909
Phelan, CA 92329-1909
760) 868-3856
Call for a free catalog.
They offer replicas of all US military holsters made from the original ordnance drawings.