Welcome XHG,
As Mnem says, correct treatment will depend on your friend’s HCV genotype and liver status. Twinvir is made by Incepta pharmaceuticals who also make medications for other genotypes. For pricing I would suggest talking directly with Alimul (also known as Parvez on this forum) at the contacts provided above….or via below:
https://fixhepc.com/forum/daa-access/435-incepta-pharmaceuticals-sof-dac-sof-led-comb.html