Finding older RPMs of current releases

Is there any place to find 10.6 RPMs such as

postgresql10-contrib-10.6-1PGDG.rhel7.x86_64.rpm
postgresql10-contrib-10.6-2PGDG.rhel7.x86_64.rpm

We have a 10.6 installation that we need the contribs for but
can't easily upgrade to 10.7 at this time.

Thanks,
PJ