[packages not found for 1.4]

hai,

I just wanted to upgrade 1.4 following the upgrade guide and can't proceed because of serverals packages which aren't available to download anymore like:

Resolving fastpull-us.funtoo.org... 192.150.253.88
Connecting to fastpull-us.funtoo.org|192.150.253.88|:443... connected.
HTTP request sent, awaiting response... 302 Found
Location: https://1153732560.rsc.cdn77.org/7/7/770571d5a802ebc8e562185af12a3bd63dc678fc1f34703d43ca9a133c6250857e7c3d3fcbb9d89faebadc1364a2a15e385f01b3d53c4f8e431969efa00dbf7e [following]
--2020-02-13 19:22:11--  https://1153732560.rsc.cdn77.org/7/7/770571d5a802ebc8e562185af12a3bd63dc678fc1f34703d43ca9a133c6250857e7c3d3fcbb9d89faebadc1364a2a15e385f01b3d53c4f8e431969efa00dbf7e
Resolving 1153732560.rsc.cdn77.org... 0.0.0.0
Connecting to 1153732560.rsc.cdn77.org|0.0.0.0|:443... failed: Connection refused.
!!! Couldn't download 'mesa-gl-headers-19.1.4.tar.xz'. Aborting.
 * Fetch failed for 'media-libs/mesa-gl-headers-19.1.4', Log file:
 *  '/var/tmp/portage/media-libs/mesa-gl-headers-19.1.4/temp/build.log'

Also

- sys-apps/tcp-wrappers-7.6.22-r1

- dev-libs/libxslt-1.1.33-r1

-app-eselect/eselect-rust-20190311

- net-misc/openssh-8.1_p1-r1

At the moment I'm stuck because of missing dependencies

Is it possible to fetch them from a different mirror?

Thanks!