I was searching Wal Mart to see if they are selling metallic Thomas, Percy, James and Nia. I found this posting. Wal Mart must forget there is something called ebay for tomy couplings. Without the triangle screw drivers, it will be difficult to remove the chassis.
https://www.walmart.ca/en/ip/4-Pairs-Rep...1KK7ZQNKN4
https://www.walmart.ca/en/ip/4-Pairs-Rep...1KK7ZQNKN4
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/