Hello, I´m Dawid and I´m new here.
Here in Europe you can buy a 32 rear sprocket hub with 32 tooth,
it´s made for Barossa and SMS Quads, but it will fit in a Yamaha Blaster.
Here are two links, as you can see they are the same.
I hope I could help.
1st more expensive for Yamaha Blaster...