For small parts of this sort you can order direct from the CZ Custom shop in the US.
Some of the CZ sights have a set screw to lock them in place and others simply rely on friction of the dovetail. But either way you will require either a sights pusher or a sturdy bench vise, set of brass punches and a medium to large hammer. Without a sight pusher or other custom made pushing tool you simply can't hold the slide well enough to drift it out with a punch and hammer without a vise.
To protect the slide from the vise jaws use a layer or two of card stock similiar to cereal boxes.
Note too that the CZ sights come in a variety of front heights. You'll need to measure the one you have. It will also depend on which rear you get if you get one which is a different height from your stock combat sight.
It's up to you but for speed of sight picture acquisition in matches I've found that the 3 white dots simply gives too much visual clutter. I far and away prefer the fiber front sight and plain blac rear notch as the fastest and most clear quick acquisition sight. Second best has proven to be a white or other colour dot front and plain rear notch. And finally I'd rather have simply black sights over a three white dot or any other outlines markings on the rear.
The dots and other markings are to aid in use during low light such as night time or dark indoor use. As Canadians shooting for fun at the range we seldom or never run into dark conditions. For us it's all about what makes the eyes pull the sight picture together the best. If the three dot setup is what works the best for you then fine. But perhaps look at some other options first.
