Years ago I installed a set of Millett fully adjustable sights on my P-95 and they were a great improvement but, unfortunately Millett no longer makes iron sights of any kind.
Currently the only replacement sights for the P95 I'm aware of are LPA fiber optic fully adjustables like these: http://precisionsalesintl.com/Product/ttf91ru.html
Installation is pretty straight forward. Field strip the gun and remove the barrel and recoil spring from the slide.
The front sight requires a small hammer, a 1/16" punch and a 1/16" drill bit, preferably in a drill press. Using the punch, drift out the two retaining pins and remove the factory blade. Seat the replacement blade firmly in the slot and tape it temporarily in place. Using the 1/16" drill bit, drill one of the holes using the hole in the ramp as a guide. I like to drill about half way through and turn the slide over and complete the hole from the other side. This assures the holes line up. Insert and seat the one pin and repeat for the other.
The rear sight requires an allen wrench to loosen the set screw and a brass punch to drift out the rear sight. Clamp the slide firmly in a padded bench vise and pound out the sight from left to right. It may be VERY tight or a slip fit. I've seen both. Be very careful not to lose the firing pin block spring and plunger under the right side of the sight as it comes off. Try fit the new rear sight and, if necessary, file the sight base dovetail (NOT the slide) until you can push it into the slide about 1/3 of the way. File slowly and try fit often . You can remove more metal but can't put it back. Once the fit is good, replace the spring and plunger and trap them under the new sight as you push it in, then drive it all the way to center with the hammer and punch. Tighten the two allen set screws and you are done.