where to find a replacement belt in HK?

trying to get a replacement belt in HK from a friend… any shops or addresses of places that have one? and the price?

I think you can get a replacement belt from G.U.M. in Hong Kong.

Here is the contact information:
Green Urban Mobility Limited
Address: 3A, On Loong Factory Building, 11-13 Luk Hop Street, San Po Kong, Kowloon.
Tel: (852) 2137 3884
E-mail: info@gum.hk