Boom Attaches to Mast

[Hunter 31]

I have a 1985 Hunter 31. It just went in the water and I am looking for some parts. There is a set of small disks that form a ball which the boom attaches to the mast. Does anyone know the technical term for this and where can I get a set?
To be more clear I believe it is where the Boom attaches to the goose neck.

 

[Don Crowther]

try rig-rite they have most of the parts for our masts and booms.

 

[Hunter 31]

Parts came today, will be heading up to the boat tonight. I hope I can figure it out. Thanks