mobile

Ok guys if someone can help me it would be cool i have looked all over the place for 2 days and have tried to reflash stock rom to my Galaxy S5 SM-G900A Kit Kat 4.4.4 the only stock firmware i can find for this model is Kit Kat 4.4.2 and that seems to be way it will not work so if someone could point me in the right place that would be very helpful.