Until I read this thread, I had no idea that Lok grips offered any significant customization. The web page where I placed my order (https://lokgrips.com/gun-grips/cz-75/palm-swell/bogies/black-g10/) just says their idea of customization is a grip liner (the orange line visible above in mpeltier's post, I think) . There's simply no hint on that page that they do the kind of work we see in this thread.
Being a lefty, I asked them if they could switch the thumb relief to the right-side grip for me, and they kindly agreed, and at no charge. I thought that was pushing the envelope If I had known I could have grips that made me look like I robbed Liberace, like superkaratemonkeyfighter, well, lets not even go there...