Several US web sites report that Shinohara (the Japanese track maker, who also supply Walthers with track) is closing down because the owners want to retire and they have no family to pass the business on to.
In answer to an enquiry I have received an email from Scalelink that says:
"Mr. Shinohara has now sold his business to another Japanese toy manufacturer who will begin production in the 2nd quarter of 2020.
We will be the UK stockists once items become available again."
This seems like good news!
Scalelink also say that
"...with the exception of 4 or 5 Shinohara products, we have reasonably good stocks available.
For 00/H0, we have Code 100, Code 83,