I managed to make another mirror out of a cheap webhost without possibility of configuring httpd, ssh and rsync.
The dates of the dirs are the actual ones and I can't use symlinks as I am syncing via FTP, what doubles the size(NS repo usually has 3GB, on my webhost 6GB).
What I did:
Via FTP I created a "/webpages/mywebpage/mirror" directory, set rights to 755 and put a .htaccess file into it.
I fetched the repo via rsync as described in 1st post and I synced it to my webhost via FTP with lftp:
lftp -u FTPUSER,FTPPASS FTPSERVER -e "set ftp:ssl-allow no; mirror -RL /var/www/repos /; chmod -R g+r /; quit"
Iftp was not able to change the rights of uploaded files during transfer so I did it afterwards with chmod. My fallback Raspberry NS mirror does the ftp sync at the moment via a cron job.
If this dirty configured webhost mirror works correctly and it seems to, then we have a new mirror with SSL: