You might want to look into Trijicon HD Night sights if you cant find the XS's as they have a large circle front post (either yellow or orange) and two small tritium inserts in the back. They are similar to the XS. Also, TruGlo is also a great sight option. Just got mine from HiCal (a dealer on CGN) and their are awesome. One other thing about the XS as I have done a lot of resarch on them is that they were developed for LEO's or people who conceal carry in the states who need to acquire their sights on the target FAST. SO, they wouldn't be the best option if your looking for accuracy. I haven't seen any XS sights sold here so I can tell you where to go but like I said, you might want to look into the HD Trijicon's or TruGlo's. Hope that helps!