Gunsmith for px4 sights replacement

[semilin]

Does anyone know a gunsmith to help sights replacement for Beretta PX4, and how much it usually cost? I did once before by myself on the front sight. It was really painful, as the PX4 sights were installed so tight. It took almost 2 hours since I didn't want to scratch the slide. Now, I want to replace both front and rear sights. If you know one around East Bay, from Tri-valley to Fremont/Milpitas area, that's will be really appreciated. Thanks!