I suppose any medieval muslim/arab models wearing more eastern clothing; so stay away from litham-wearing figurines and stick to models wearing turbans. So something like these guys from Perry Miniatures:
...but not minis such as these from Gripping Beast:
Having said that as the original Nizaris fled East from Egypt just before the first crusade. As they ended up in Iran, Iraq and western India the common foot soldiers might even look quite Turkic.