Choose something that has ambidextrous or reversible controls. It really takes the hassle out of dealing with the gun’s ergonomics. This can make a big difference when you’re shooting or handling malfunctions with your support hand.
Walther PDP, the ergonomics are great, and it seems like it was made with left-handed users in mind.
But for me, nothing compares to trying a few out at the shop or range to see what feels right for you...
I have the same problem of righthand grips but must shoot left-handed because I lost my right eye. Most of my pistols were right hand target simi-autos. I have taught myself to make new left-hand grips for my pistols. It is great satisfaction to find out I can make a better fitting grip for my hand than I can buy. Many commercial grips are one size fits no-one. It does not take a lot of tools; I use mainly one round 3/8 wood rasp, two small ovel wood rasp and sand paper.