issue with discontinued or missing journal
Publishers who care about the availability of published works tend to join archival initiatives such as the Controlled Lots Of Copies Keeps Stuff Safe (CLOCKSS) or Portico. These archives become public after so-called 'trigger events' occur (as determined by a governing body of these initiatives), such as when the articles are no longer available through the original publisher. This archival is a primary function of a scholarly communication system (see also Roosendaal &amp; Geurts, 1998)

If your publisher does not have this policy, you could rehost the article on your webpage or another file sharing site. Note that this would depend on the copyright status, because if the publisher (for example) went bankrupt the copyrights might be transferred in a firesale of that company.

Edit: Centralized => Controlled