Ball Head
From Amazon
3 Legged Thing AirHed Pro Lever Arca-Swiss Compatible Tripod Ball Head with 360 Degree Panning Base and Detachable Lever Clamp - Tripod and Monopod Compatible (AHPRO-LV-GREY)
WEX Photo Video
3 Legged Thing AirHed Pro Arca Ball Head with Level Plate Lock - Grey