After digging around it looks like the maker of these and other fine display shelves has stopped selling. His web site is no longer there and the Domain name is for sale. Its a shame as these were great. He even had custom made shipping boxes with custom styrofoam to protect them during shipping.
I do see several displays on Ebay and I believe one even shows Trackmaster/Tomy trains on it. Amazon has some too AMAZON There is also this site that has some but I would query the dimensions to be sure your trains will fit properly.
https://www.sfdisplay.com/traindisplaycabinets.aspx
There is also this fellow I just happened to come across http://www.trainrackstore.com/
I do see several displays on Ebay and I believe one even shows Trackmaster/Tomy trains on it. Amazon has some too AMAZON There is also this site that has some but I would query the dimensions to be sure your trains will fit properly.
https://www.sfdisplay.com/traindisplaycabinets.aspx
There is also this fellow I just happened to come across http://www.trainrackstore.com/