How can I fix my cvt transmission? ?

I own a nissan tiida sedan produced in 2005. The car has developed cvt transmission problem. The rings outside the main chamber have worn out. My mechanic says cvt transmission is not repairable. But replacement with a new transmission is highly expensive. The same is not also available in my country. The details of my car is given below: Make: Nissan Model: DBA-SC11 (Tiida Latio 1500cc) Year- 2005 Chasis number: SC11-028703 Engine no. HR15 144670. Jatco is the manufacturer of the cvt. Can anyone help me in mending the transmission?