You best download the Yamaha Nouvo AT135 (Elegance 135LC) Parts Catalog and look which parts you need to fix your scooter, if you have a list of all parts you need you can basically order them from any Yamaha dealer in Thailand, probably also direct from Yamaha Thailand.
You can download the Yamaha Elegance 135LC Parts Catalog here:
I used to work in Indonesia but do not read and write very well!
Not through me exactly but if you can't find them anywhere else I will be happy to walk to Yamaha and get one for you.
You will have to tell me exactly what you want and it has to be to my schedule not yours.