DEWALT TSTAK Storage Trolley - DWST1-71196 for sale online | eBay
DeWALT DWST1-71196 TStak Trolley - YouTube
TSTAK TROLLEY | DEWALT
DeWalt DWST1-71196 TStak Trolley with Foldable Handle
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