Antenna Cage for Cine RT Ranger / Tracker Handset
To fit this cage, you will need to replace the handset’s top left hand side screw (as seen from the rear) with a slightly longer one.
The socket head (Allen) cap screw needs to be an M3 x 25mm
In the UK, I have found Westfield Fasteners a good reliable source for imperial nuts and bolts and the link above is to their site.
Cage is available in 7 colours