Sometimes the sights you prefer won't fit the dovetail of the slide. A simple dovetail file from Brownells will allow you to modify the dovetail or the sight for a good fit. I prefer to modify the sight unless the new sights will be a permanent part and you don't foresee ever selling the gun.
Girsan lists some sights but I don't see whether or not they are night sights - http://girsan.com.tr/en/sights
perhaps customer service can tell you which sights are and which might be compatible with the existing dovetails.