Amazon.com : SmallRig Mini Follow Focus with A/B Stops & 15mm Rod Clamp and Snap-on Gear Ring Belt for DLSRs and Mirrorless Cameras, Fits Different Diameter Lenses Up to 114mm - 3010 :
SmallRig Universal 15mm LWS Rod Mount Lens Support For 73-108mm Dslr Camera Lens Bracket Support With 15mm Rod Clamp -2727 – Photo Camera Store
North 80798 Lens Clamp Kit - Upper and Lower
ANAMORPHIC CLAMP FOR ANY LENS PERFECT FIT ~ Isco, Kowa, B&H, Iscorama. NO SCREWS 601547477210 | eBay
RafCamera 52mm clamp to M58x0.75 male thread adapter for Kowa...
Rapido Anamorphic Lens Clamp V2 with Rail Support - Cameras - EOSHD Forum