You can do a custom one from wmbrownholster.com, or you can also use one on sportsmansguide.com. I have one coming from sportsmansguide.com that is a light tan, and made for scoped MKIII pistols. Once the season is over, I'm going to send my gun off to wmbrownholster.com and have him do a cutom one to match the one I'm having made for the Colt Anaconda.
http://www.sportsmansguide.com/net/cb/ruger-mk-1-ii-iii-scoped-holster.aspx?a=797062https://www.wmbrownholster.com/
