Custom Made 6x9 to 6.5" Speaker Adapters (Fits Dodge, Chrysler and Man – Sounds Good Stereo Online
4pcs Universal 6x9 5x7 6x8 to 5.25 6.5 Inch Car Boat Speaker Adapter Plate 226200810557 | eBay
Aluminum Door Speaker Adapter Plates (ND Miata) – Paco Motorsports
2pcs 8 - 6.5 Inch For Volkswagen Magotan Skoda Washer Adapter Brackets Speaker Mount Plates Special Speaker Mat Solid Pad Nylon - Speakers - AliExpress
2pcs High Quality Universal Aluminum Alloy 6.5 Inch Speaker Mount Speakers Pad Adapter Plates Bracket Ring Mat Car Refit 6.5'' - Speaker Mounts - AliExpress
Amazon.com: Black Plastic 6.5"" Car Speaker Adapters Mount Plates Bracket Pack of 2 : Electronics
Amazon.com: XtremeAmazing Car Stereo Door Speaker Adapter Mounting Plates 6.5 Inch 6.75 Inch 165mm Stand Ring Kit with Wiring Harness Cable Set of 4 : Electronics