You can get them from Amazon for $26-29 if I remember correctly.Idea of the sight itself is ok,but there is two things I didn't like.First,"optic fiber" inserts that come with the sight are just plastic,they are not fiber optic material.Second,the inside of the hole where you insert optic rod,have a little step to prevent hiviz original bottleneck shaped inserts to go farther back more then necessary.And that little step makes it almost impossible to install any replacement fiber rods in there.Hole in them is 2mm,1.5 is too loose.I would rather go with something else.