its there already, Handphone Inspiration. Its at marina square near the food court/BK/Sukiya area. In fact, they are the ones who recommended me to do it this way. Basically they will need to customise the inner screen protector to be just abit smaller than the stock protector size, then paste over it, leaving just enough to be able to carefully pry out when replacing the protector/selling the phone. It HAS to be the normal hydrogel and matte type though, no glossy as it will somehow stick tgt when closed.
i dun have the photo of the N5 with the hydrogel protector anymore, but i have 1 with the N3, but screen is on