Aluminum Alloy Quick Release Seat Post Clamp For MTB Bike Accessories And Bicycle Cycling 34.9mm, Available In Red, Black, Gold, Silver, And Blue 535 Z2 From Loungersofa, $3.55 | DHgate.Com
2 1/8 inch billet clamp aluminum bolt bracket 2 1/8 inch cage bar tube clamp | eBay
S5027S-AL ZSi-Foster | Weld Mount Beta Clamp | Standard Series | For 1 — HoseWarehouse