Also did the PE foam mod and it does sound better : r/MechanicalKeyboards
Keyboard Case Foam (Poron) | Kinetic Labs
Best Sound Dampening Foams For A Keyboard - Switch and Click
Keyboard Case Dampening Foam for 60% keyboards by Kelowna | Flashquark Mechanical Keyboard Store
How to Modify Your Keyboard Case and Plate to Perfection
SKB Keyboard Case 1SKB-5820W Foam Insert (Foam ONLY) — Cobra Foam Inserts and Cases
Discipline65 case and plate foam set – StupidFishEnterprises
Best Sound Dampening Foams For A Keyboard - Switch and Click
FYI, the foam used to ship the KBDFans 5* case works great to dampen the metallic ping of the case : r/MechanicalKeyboards
Geon PCB Case Foam – Divinikey
KBDFans DZ65RGB Sound Dampening Case Foam
How to Modify Your Keyboard Case and Plate to Perfection
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
Case and plate foam precuts at mkultra - New (in-stock) products - KeebTalk
AVA EVA Case Foam Pack (3-piece set) – Sneakbox
FlexiEVA DZ60 Rev 3.0 Case Foam – Upgrade Keyboards
Scarlet case and plate foam set – StupidFishEnterprises
What Is the Purpose of Keyboard Foam? - Glorious Gaming
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
KPrepublic Gasket Poron Bottom Pad Pads Foam for Mechanical Keyboard L
MelGeek Raindrop Keyboard Foam Dampener for PCB Plate Case Compatible with 60% Mechanical Keyboard Mojo60 - AliExpress
What Is Keyboard Plate & Case Foam? | Fantech World