Here are the answer to your questions. Holster: I ordered a custom job from remora holsters. They have drop down lists that make it easy. Select make, model, LH or RH, choose option for rail with light/laser, color, OWB or IWB, paddle or belt and that' s it. Cost about $65, reasonable, considering I'm LH. Also have option for thumb break and plush interior both of which I chose. Ordered last week, expect it soon, will post pics.
As for the question on the rail, they did such a fine job I can't tell whether they used a curved one, but I do know they had to cut it down and refinish. I showed it around and all agreed the workmanship was flawless. I have put 150 rounds through and it is solid as a rock. Marcus at Wright Armory in Tempe AZ did the work.
On another ubject, for those of you with CZ's normal size without rail and want one I recommend Ramlite. They make a magnetic rail you can attach anything to. Also well made, and takes 1 second to install or remove. That's it for now. Holster pics next.
One more thing. I could add the pics directly on the post. I hsd to use that link. Someone please tell me how to do it without link please.