Poron Keyboard Foam 13.7x5.9x0.13in for Custom Keyboard, Keyboard Bottom Dampening Foam, Noise Foam - Walmart.com
60% Plate Foam – Upgrade Keyboards
Amazon.com: Foam Wizard - Keyboard Foam Compatible with Glorious GMMK Pro Mechanical Keyboard ANSI Layout Includes Case and Plate Foam - Noise Suppression - Laser Cut - Pure EVA Foam - Easy to Install : Electronics
Also did the PE foam mod and it does sound better : r/MechanicalKeyboards
Keydous NJ80 Keyboard Plate Foam Poron Felt Materials - AliExpress
Keyboard Case and Plate Foam Mod | XBitLabs
Amazon.com: HONKID Keyboard Foam, Sound Dampening Foam for Mechanical Keyboard Bottom, Made of LE-20 Poron, Black (H 2mm) : Electronics
Amazon.com: RUNJRX Felt Keyboard PCB Foam 60 Layout,Poron Switch Pads 120Pcs and Sound Dampeners for Custom, Black (RJ-095) : Electronics
KBDfans Mechanical Keyboard Spacebar Foam – Divinikey
Foam Kit for Createkeebs Glacier 80 Mechanical Keyboard
Poron Material High Elasticity Mechanical Keyboard Bottom Foam Sandwich Cotton Silencer Foam For 61 Left Shift 64 65 67 68 87 - AliExpress
What Is the Purpose of Keyboard Foam? - Glorious Gaming
Amazon.com: mintcaps Keyboard Sound Dampening Foam 84 Layout Silencer Pad Gasket EVA Foam Keyboard Switches Dampening Foam Pad for Mechanical Keyboard : Video Games
ATTACK SHARK Gaming Keyboard Cloud Wrist Rest Pad,Memory Foam Keyboard Palm Rest, Ergonomic Hand Rest Support for Computer Keyboard Laptop Mac Cute Desk Lightweight for Easy Typing Pain Relief-White - Walmart.com
What Is the Purpose of Keyboard Foam? - Glorious Gaming
Drop SENSE75 IXPE Switch Foam | Mechanical Keyboards | Components Mechanical Keyboards
Amazon.com: mintcaps 2 Pieces Set of Keyboard Sound Dampening Foam 68 Layout Silencer Pad Gasket EVA Foam Keyboard Switches Dampener Foam Pad for Mechanical Keyboard : Video Games
Silicone Sound Dampening Noise Absorption Soundproofing between Plate – KPrepublic
MelGeek Raindrop 60% Dampener Foam for Mechanical Keyboard
DIY $0 sound dampening foam for custom keyboard - YouTube
75% 84 Mute Cotton Foam For 75% YMD 75V2 75V3 Hotswap PCB Plate For Mechanical Keyboard Good Parts - AliExpress
