I'm left handed right eye dominant. I shoot both left and right handed but have no trouble shooting a right handed gun. Hell, lefty's have been adapting all our lives.
This is just one more thing. I've never had any real desire to buy a left handed gun. I do have one 10-22 with a left hand stock on it but that was more out of happenstance. I just happened to find the stock at a gun show. I like the color and when I picked it up I said "...Neat!"
When I shoot left handed I rather move the gun a little or just use my left eye. Everything is a pain in the ass till you're used to it.