ok correct Koi faida nae,,, but still if u really really reallllllllllyyyyyyyyyyy wana do it, wt ever The hell,,, (I Know wt u mean,,, once i asked Honda Fort to install Civic Sunroof to ma 06 city.... 3 hrs of discussion later they said no... Thank God....)
But u R in luck as this same Model City came With Sunroof in India and may be also Thailand so the best Way (and most Expensive ) would be to get a new Roof (Metel one) for the Sunroof model and replace Your Roof With it,,, than u can install original Sunroof In it ....