you can keep the ICT numba plate on the back.
on the front make a numba plate with font exactly like ICT's with either "ICT" or "Islamabad capital territory" written on it.
colour shud be white and black border. try to get one that is chemically etched and has unpainted silver lining around the border and the font in order to giv the embossed effect. in this way u can hav a plate that fits your JDM car. i have done it and also got the hind no. plate and it looks really good.