There is one close to the entrance of National Taiwan University on Fushing South Road. The name of the store is "Leh-Yeh". The address is F2, 358-1, Fu-shing S. Rd, Sec. 2, Taipei City. Their Phone# is (02)2732-4575.
I think "Leh-Yeh" is good too! It sold lots shoes for badminton & volleyball. All my badminton shoes are bought from there.
Here are the links to the webpage of Mizuno Taiwan and there is the information that you asked for. Volleyball Shoes http://www.mizuno.com.tw/workspace/basic/mizuno/html/sports/product.jsp?id=fxkIRKhTpn0r48RZ5LglGyQ8r6yWmj&father_name=4 Badminton Shoes http://www.mizuno.com.tw/workspace/basic/mizuno/html/sports/product.jsp?id=eOjNTRNsbLeBMwEiAIJBseRkDRjdu8&father_name=4 The price on these pages are MSRP. You should be able to get some discounts in the store(s).
