i'm a lefty and i've never had a problem using the joysticks with the d-pad/analog stick on the left and buttons on the right.
It can't be that bad to just get used to it that way, because all consoles and most video game controllers are generally that way.
Ever try just flipping your joystick so it's upsidedown? lol... then it's pseudo left-handed.
Well other than just taking apart an old joystick and reassembling it to be left-handed i think you'll be S.O.L.
good luck!