Here's one option. The savage bolt on top in the picture has a PCR Phoenix knob installed. We offer a few different knobs for savage and blend them to fit the contour of the handle. All we need is your handle.
Custom knob, install, Cerakote to match and return shipping for $100.
It is a modular system where you undo the rear bolt screw and replace the entire bolt knob. I really like the savage system. Glades tactical is my favorite knobs for savage.