Phot-R Telescopic Reflector Holder with Swivel Head Grip, 66-175cm (26”-69”), Extendable Rotating Boom Arm Support Clamp Bracket Mount for Pop-Up Backgrounds, Backdrops & 5in1 Reflectors 5-in-1 for use with Light Stands: Amazon.co.uk:
Reflector Holder Studio Boom Arm Light Stand Collapsible Professional Photo Grip | eBay
Herrmans 43R Handlebar Grips With Red Reflectors . HRM344