Scarlet case and plate foam set – StupidFishEnterprises
AVA EVA Case Foam Pack (3-piece set) – Sneakbox
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
Best Sound Dampening Foams For A Keyboard - Switch and Click
What Is the Purpose of Keyboard Foam? - Glorious Gaming
HJ Customized Mechanical Keyboard Case Bottom Foam Sandwich Cotton Silencer Foam For 61 Left Shift 64 65 67 68 87 - AliExpress
How to Modify Your Keyboard Case and Plate to Perfection
Amazon.com: HONKID Keyboard Foam, Sound Dampening Foam for Mechanical Keyboard Bottom, Made of LE-20 Poron, Black (H 2mm) : Electronics
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
What Is Keyboard Plate & Case Foam? | Fantech World
KBDFans DZ65RGB Sound Dampening Case Foam
Case Foam Collection – KBDfans® Mechanical Keyboards Store
Keyboard Case Dampening Foam for 60% keyboards by Kelowna | Flashquark Mechanical Keyboard Store
Keychron Q2 case and plate foam set – StupidFishEnterprises
Keyboard Plate Dampening Foam for 60% keyboards by Kelowna | Flashquark Mechanical Keyboard Store
Also did the PE foam mod and it does sound better : r/MechanicalKeyboards