Amazon.com: BRCOVAN Aluminum Alloy Mount Base with 1'' TPU Ball & 10mm Mounting Hole, Angled Bolt Head Adapter Ball Base Compatible with RAM Mounts B Size 1 Inch Ball Double Socket Arm :
RAM® Flex Adhesive Ball Base – RAM Mounts
RAM® Round Plate with Ball - B Size – RAM Mounts
RAM Bond A Base - Inflatable/White - California Canoe & Kayak