In Bulgaria is very difficult to find this coin, but I think that it can maybe find some ордынские coin. I don`t sure, but in Bulgaria often are find coins with arabic superscription, that I don`t sure are arabic, ордынские or another same coin for this time 12-15 century. I don`t see in Bulgaria to finds, русские монеты 12 - 17 веков

Best Regards