Browning X Bolt replacement knob

[VancouverS4]

I just built out a Browning X bolt into an MDT chassis and upon first shots I'm not happy with the bolt knob. It actually is the whole lever and knob that attaches as one piece to the bolt/shroud. Anyone know how I could figure out the pitch / fitment? I see Cadex uses a similar looking bolt knob.

Thanks in advance.