When choosing a foam insert for your case, you have two options: pick and pluck or custom cut foam. Here is a breakdown of the pros and cons of each type of insert
1010 Pelican Pick N Pluck Foam, 1-Piece Set
Pre-cutting Foam Insert High Density Pick Pluck Toolbox Foam Power Tool Hard Case And Flight Case Grid Sponge Customizable Size - AliExpress
How to Repair Pick-N-Pluck Foam - Equipment (No astrophotography) - Cloudy Nights
Pelican 1600 Case - Kaizen Foam Inserts – KCI Tools
Pick and Pluck Foam Setup for SKB / Pelican Case
Pelican Case 1400 Replacement Pick & Pluck Foam Inserts (3 Pieces) — Cobra Foam Inserts and Cases
Custom Foam Inserts with MyCaseBuilder
Shell Case Hybrid 350 EVA Carrying Case
Customizable Foam - Case Club
Package includes: You will get 1 pieces of black high density foam, 16 x 12 x 2 inches, you can cut the design according to your needs. Tool box foam
HolyMaji Pick and Pluck Pre Cubed Foam, High Density Customizable Pick Apart Foam Insert, Pre Cutted Case Foam Pads for Board Game Tool Interlock Box
Custom Foam Case Inserts - Hard Case, Tool Box - Impact & Shock Proof