Roll-N-Lock M-Series XT Tonneau Cover

RetraxPRO XR Retractable Truck Bed Tonneau Cover Key Features: Overlander capabilities with Trax Rail System Compatible with T-Slot

I don't know much about this company other than I saw their website It might be an option for you com One negative I can see

tonneau cover with t slot RetraxPRO XR Tonneau Cover Highlights: Supports up to 500 lbs evenly distributed Compatible with most T-slot accessories from Rhino Rack, Yakima, Thule,

royal cash slot I'm also looking for a rolling tonneau with the t slots, but right now we are out of luck Hopefully something comes out soon I already