Hi @heus
Various addons have been removed from IPFire as mentioned in the Core Update 158 announcement
https://blog.ipfire.org/post/ipfire-2-25-core-update-158-released#add-ons
due to no longer being supported or even the upstream project being discontinued.
The last release of LCD4Linux was in 2005 and the last development was in 2007. The source tarballs no longer exist. Trying to download any of the tarballs gets a 404 Not Found message.
Also see this post
https://community.ipfire.org/t/adding-asterisk-add-on-after-backup-fails/5899/4
Regarding your issues with LCDProc, I am sure there will be community members who will be able to help you solve your migration problems.