You have to call them. I've bought from them at the gun show and their prices were better than anyone else I've seen, particularly if you buy in quantities of 20 or more.
Ranch Peroducts makes moonclips not only foir 45 ACP but 38 SPecial, 40 S&W and 38 Super. You have to call the number on their website to order. They are great people to deal with.