Amazon.com: Structural Pipe Fitting, 1-1/2" Wall Flange - Triangle, 51B-8, Aluminum Magnesium, Please note. ID of fitting is 1.925, to take nominal 1-1/2" steel pipe which all have an OD of 1.9". :
Amazon.com: Ispeedytech 3 inch V Band Flange Clamp Set V-Band kit Turbine Exit Pipe for Borg Warner Turbo S200 S200-SXE S300 S300-SXE S200SX 3.5" : Automotive
Amazon.com: 3 Inch V Band Clamp CNC Stainless Steel Flanges, 3in SS Vband, V-Band Flange Kit : Automotive
Amazon.com: YaeMarine 12 Inch Polished Stainless Heavy Duty Oval Boat Marine Grab Handle Hand Rail with Flange & Stud (1) : Sports & Outdoors
Amazon.com: 4" Inch V Band Clamp with Stainless Steel Flange 4 Inch V Band Bolt Clamp With 2 Male Female Flanges for Turbo Pipe Performance Exhaust Sysformance Exhaust Pipes : Automotive