Amazon.com : Manfrotto L Bracket Q2 MS050M4-Q2,Gray : Electronics
Amazon.com : SmallRig Rotatable Collar Mount Plate for Sony Alpha 7R V/Alpha 7 IV/Alpha 7S III/Alpha 7R IV, for Arca-Type and for Manfrotto RC2 Plate, Supporting Horizontal and Vertical Shooting - 4148 :
3 Legged Thing Zelda Dedicated L-bracket Quick Release Plate for Nikon Z5, Z6, Z7, Z6 II, Z7 II
SmallRig Arca L-Bracket for Sony Alpha 7 IV/Alpha 7S III/Alpha 1/Alpha 7R V-3660 | eBay
L-bracket for Sony α7R III & Sony α9 - GSLBRSY | Gitzo US
Amazon.com : Manfrotto L Bracket Q2 MS050M4-Q2,Gray : Electronics
PLSA73 Arca-Swiss L-Bracket for Sony Alpha A7 III and A7R III | ProMediaGear
PLSVGC3EM Arca-Swiss L-Bracket for Sony A9, A7 III, and A7R III with VG-C3EM | ProMediaGear