Tomy did create storage bins but they have since discontinue. They cost and arm and a leg these days. Majority of my collections are stored in shoe boxes. I just stack several layers.
My Trackmaster/Tomy/Plarail Photo Gallery Page (over 600+ photos and still under construction)
https://www.flickr.com/photos/183311600@N03/
https://www.flickr.com/photos/183311600@N03/