Amazon.com: uxcell 3.5" 3.5 Inches Speaker Foam Edge Surround Rings Replacement Parts for Speaker Repair or DIY 2pcs : Electronics
Amazon.com: Springfield Speaker 6.5" Foam Surround Repair Kit - 2 Speaker Kit - Compatible with Several Dozen Commonly Used 6.5" Speakers of Different Brands and Models Whose Foams Match The Measurements : Electronics
Foam surround for a speaker with a cone size of 5,5 cm
Finlemho 2pcs Speaker Woofer Repair Kit Foam Surround 6*9 Inch Oval Shape F69 For Car Speaker Bookshelf Audio Home Theater Hifi - Speaker Accessories - AliExpress
Amazon.com: Standard 10" Angle-Attach Speaker Foam Surround Repair Kit - 2 Speaker Kit - Fits Several Dozen Different Commonly Used 10" Speakers of Different Brands and Models Whose Foams Match The Measurements :