Sure. There are a plethora of ambi safeties available on the aftermarket. Some of good quality and some junk (Mueshke for one). Kimber offers an ambi, also. Retention methods for the Lefty paddle (right side) vary, but the two most common are (1) a flat arm that extends under the right grip panel and (2) retention by an extra length hammer pin with a tongue that fits into a groove in the back of the off side lever. Proper installation requires fitting the sear blocking lug on the back of the safety plate to the sear. That is done by carefull measurement and filing to fit til the safety will lock in the safe position allowing zero movement of the sear.
A couple threads for you to read below that should futher your understanding.
As far as looks, since the slide does not have a indent or circle for a ambi safety - will the added safety be on top of the slide side or will the smith drill a hole & drill a circle indent on the plain flat slide?
The middle pic in post #7 is my gun. If you are interested in the ambi safety you see on that gun pm me. Chuck Rogers has my gun right now, and is fitting a new left side only thumb safety so I won't be using the ambi anymore.