I spotted this on the tool launch page for the DWST08017 Toughsystem to Tstak adapter - looks like it may play with the non Tstak organisers too : r/Dewalt

DeWalt Toughsystem to T-Stak Adaptor Plate (DWST08017-1 TSTAK Adapter) - Ray Grahams DIY Store

New TSTAK Job Chest : r/Dewalt, tstak

Connect DEWALT TOUGHSYSTEM 2.0 Products to TSTAK Modules, Pro Organizers, And TOUGHCASE Sets

DEWALT TOUGHSYSTEM 2.0 Adaptor DWST08017 - Acme Tools

DEWALT® TOUGHSYSTEM® 2.0 Adaptor

DEWALT® TOUGHSYSTEM® 2.0 Adaptor

DEWALT TOUGHSYSTEM 2.0 Tool Storage Adaptor, Connecting DEWALT TOUGHSYSTEM 2.0 products to DEWALT TSTAK (DWST08017) : Tools & Home Improvement

DEWALT Adaptor Plate for TOUGHSYSTEM 2.0 DWST08017 - The Home Depot

Connect Tough System, Tstak, Pro Containers, and tough cases! Dewalt DWST08017

Dewalt TSTAK to TOUGHSYSTEM Adaptor!

New Dewalt ToughSystem Adapter for Tstak and More!

Connect Tough System, Tstak, Pro Containers, and tough cases! Dewalt DWST08017

DEWALT DEW-DWST08017 TOUGHSYSTEM 2.0 Adapter Plate For TSTAK - Atlas-Machinery