I highly suggest the scope mounts at https://kalinkaoptics.com/npz-ak-saiga-vepr-centered-side-mount-w-180-mm-weaver-rail-1.html. I have a SAR Romanian and a PSL and they are
extremely well made and fit very well.
I did two for bolt hold open on the range. You need to solder or braze a piece of metal inside the end of the charging handle channel of the top cover. If I can find the link where I found out about it
I'll repost.