Look at
smartcarry.com
and see if they can make a lefty for you. They hand-stitch all their products so I don't think it'll be a problem. I use the same holster for my XD45 and my S&W 640 (a 2" snubby).
The smartcarry holster is basically a short apron you wear inside your pants, over your crotch. It has a pocket for your pistol and another pocket for a spare mag.
Pro: Undetectable unless you hang out with meat gazers.
Provides VERY deep concealment.
Company has a 30-day, no-questions-asked warranty. If you don't like it, send it back for a refund.
Con:
It is a slower draw than other holsters.
Can be a little hard to get used to.
To check if you can use the Smart Carry holster with your current rig: Slide your hand into your pants up to the wrist. Make a fist. Withdraw your fist. If you can do this you can use the Smart Carry.