I have an SMR and a Woodsrunner. Both fit me just fine on the left side. The WR even has significant cast in the wrong direction, but I can't tell it from bringing it up to my face and straight back into my shoulder, it just fits.
I built a left-handed gun, it's okay but the lock sucks. Really good left-handed locks are hard to find so I bought from one of the usual suspects. The next time I built a gun from a board it wore a Kibler lock because it doesn't make a rat's behind which side the lock is on as far as shooting goes.
According to a Colt revolver book I have, it is pretty certain that Sam Colt was at least left eye dominant and shot his revolvers left handed. He was also a megalomaniac and it was only natural that he wouldn't give a speckled damn about anyone else's inconvenience handling his creations. He also nearly ruined his company by making the historically stupid decision of refusing Rollin White's patent offer, but that's another story.
And to Mr. Kibler, it's your business and you run it how you need to to remain profitable. I hope your investments eventually make you a pile of money, you have earned it. However, if the tables were turned and YOU were left handed, or born with some other handicap, your attitude toward others like that would be very different. "Pride" is why most of us buy your products, some (like me) would be proud to own a proper, left-handed example of at least one of your designs. Refusing to consider 10% of your potential customer base and even going so far as to insult them is a poor business move. I guarantee you wouldn't be happy if all you could buy was a left-handed Woodsrunner to shoot.