Amazon.com: Front Door Speaker Adapter Spacer Rings Fits Mazda 07-14 Mazda CX-9 & 03-11 RX-8- SAK021_55-1 Pair : Electronics
Car Audio Speaker Accessories Parts 6.5 Inch Cast Aluminum Adapter Speaker Mounting Spacer for Nissan Suzuki Mazda - China Car Audio, Speaker Accessories Parts | Made-in-China.com
2 Speaker Adapter 8" to 6.5" Installation Bracket Convert For MAZDA Front Door | eBay
2004-2015 Mazda 3 Speaker Adapter to use a 5.25" or 6.5" in the 6"x8" Speaker Location - Walmart.com
For Mazda 3,Mazda 6 2014-2015,Mazda CX-5 2013-2015 Front Door 6.5" Speaker Adapter Spacer Rings - AliExpress
1 Pair 6.5" Rear Door Speaker Adapter Ring for Mazda CX-4 CX-5 CX-7 Axela Atez | eBay
2 Pcs Car Speaker Spacer 6.5'' For Mazda M3 M5 M6 M8 Car Audio Horn Refit Rings Mat Mount Adapter Stereo Install Black Solid - Speaker Mounts - AliExpress