crazybob
You can reconfigure the repo settings to point at the obsolete folder tree.
Depending what updates your server has on it, it can be tricky getting the update started (ie your action to take will depend on the error message received etc).
I have given quite detailed instructions re how to upgrade a sme7.x server using the obsolete tree repos, so search these forums on my name & obsolete and go back many months to a year or two.