The aluminium dove-tailed AP-620 Sony FE 200-600 f/5.6-6.3 G OSS Replacement Foot lets you attach accessories to the top as well as the bottom of the foot.
B&H Photo Video Digital Cameras, Photography, Computers
Wimberley AP-502 Replacement Lens Foot – Gaffarbhai and Sons
The lens replacement foot is tailor-made for Sony FE 200-600mm f/5.6-6.3 G OSS Lens; the net weight is about 100g; The lens tripod mount ring
iShoot Replacement Lens Foot IS-THS260 for Sony FE 200-600mm f/5.6-6.3 G OSS Super Telephoto Zoom E-Mount Lens SEL200600G - Arca-Swiss Style
Nature Photography Blog
The lens replacement foot is tailor-made for Sony FE 200-600mm f/5.6-6.3 G OSS Lens; the net weight is about 100g; The lens tripod mount ring
iShoot Replacement Lens Foot IS-THS260 for Sony FE 200-600mm f/5.6-6.3 G OSS Super Telephoto Zoom E-Mount Lens SEL200600G - Arca-Swiss Style
This lens collar replacement foot is tailor-made and compatible with Sony FE 200-600mm f/5.6-6.3 G OSS Lens SEL200600G, can't be used with other lens,
iShoot Lens Collar Replacement Foot, Tripod Mount Rings Stand Base Compatible with Sony FE 200-600mm f/5.6-6.3 G OSS Lens SEL200600G, Built-in
Gear Review: Sony 200-600 f/5.6-6.3 G Telephoto Lens
B&H Photo Video Digital Cameras, Photography, Computers
Wimberley Professional Photo Gear - The Wimberley MonoGimbal Head
Nature Photography Blog
Buy Wimberley AP-620 Replacement Foot for Sony FE 200-600 f/5.6-6.3 G OSS featuring Replaces the Lens's Original Foot, Arca-Type Compatible Double
Wimberley AP-620 Replacement Foot for Sony FE 200-600 f/5.6-6.3 G OSS