single room in Maastricht

I am 25 year old master exchange student from Istanbul, Turkey. I will be staying from late August to late December in Maastricht. I am looking for a single room, furnished around the city center preferably a dorm room. I will be glad if anyone could help me finding one for at least first month of my stay. No problem with share bathroom and shower. I have a budget around 350-450 euros monthly. Thank you for helping.