Jesse James,
I ordered MR actions back in the day, and sold them all after they arrived. Remember they were designed and manufactured as a component to be sold to custom gunsmiths.
My wife is a lefty, so I understand full well what you are facing.
I would go get a Ruger No. 1 in .338 WM, which comes with a 26" barrel and use that until your perfect rifle finally arrives. You might find that you don't need it after all.
jim