Compatible with OVAL saddle rails.
eBay
Oval 7*9 / 7*10 mm Carbon Seatpost Clamp Carbon Saddle Rail Parts Seatpost Clamp Suitable For Scott/Argon/Cervelo Road Bike
Aliexpress UK
Fits 7mm x 9mm oval carbon rails.
eBay
Bicycle Seat Pipe Clamp Conversion Sleeve Carbon Rail Cushion Seatpost Clips for Carbon Saddle Rails 7x9/7x7mm
Aliexpress UK
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Bike Seatpost Clamp Bicycle Seat Pipe Clamp Conversion Sleeve Bicycle Seatpost Clamp for Carbon Saddle Rails 7x9/7x7mm
Aliexpress UK
Comes with carbon rail clamps and full bolt assembly as shown.
eBay
Specialized Sitero Expert Body Geometry Racing Roadbike Triathlon TT Multisport Bicycle Bike Seat Saddle carbon saddle
Aliexpress UK
Anodized Pave seatpost saddle clamp with both 7mm and 9mm ears for alloy and carbon posts. Brand new in package
eBay
Bike Frame Seat Post Head Parts Track Type Seatpost Clamp Carbon Frame Seat Post Saddle Clamp Compatible 7*7mm and 7*9mm Rail
Aliexpress UK
400mm length and 20mm setback. Fits round (alloy) rails. Clean, excellent condition.
eBay
Bike Seat Post Clamp For Carbon Saddle Rails 7x9mm Bicycle Oval Round Clip Bicycle Seatpost Clamp Head Parts Cycling Accessories
Aliexpress UK
Length: 300mm. - Model: S-Works Tarmac. - Material: Carbon. We are located in Japan. - Condition: Used (visible signs of wear, scratches, and dirt). - Condition: Used. I don't know about the situation in your country.
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elitaone Bicycle Seat post 63D Ultralight Carbon Top Clamp Suitable MTB/Road Carbon saddle Rails Lengthened 450mm
Aliexpress UK
Manbily WZ-324 Carbon Fiber Tripod & 44mm Diameter Saddle Ball Head BH-U3,32mm Tube Hunting Set (* The Clamp Can't Be Removed)
Aliexpress UK