there is a workshop on salwa road called crystal they do lambo door.

they range between 10,000/- qar to 15,000/= depending on what make do you want them and do u want automatic remote controlled pop up door or manual ones.

they usually come with one year warranty and yes they are allowed here without any soecial permits.

u do have to be aware that lambo door need their rubbers changed quiet often and hence are not suitable for a daily use car.