Very awesome.
What tools are needed and where do you get the foam?
The 1" thick blue and 1/4" thick red "cross-linked polyethylene" foam was obtained from Allied Foam Fabricators in Oklahoma City. Very good people to work with. Lisa is the best! She made the suggestion of which type of foam to use and of using a contrasting color for the bottom layer, something I would not have thought of. The larger drawers of the tool cabinets were quite large at 36.75" wide by 19.5" deep. We did 5 of those drawers plus one drawer 19.5" wide by 11.875" deep for each of the 3 tool carts. So actually came to about $500 worth of foam. The remainder of the drawers were used to store mic cables, power cords, etc.
My friend's CNC router is an entry level machine with about a 36" x 48" table. He experimented with several kinds of router bits and ended up with a specific type made for foam cutting. He devoted a lot of time measuring all the equipment, programming the software, and testing feed rates and bit speeds for his first attempt at routing foam.
He ended up buying some foam himself and making drawer inserts for some of his shop tool cabinets!