User "john" brought up a good point that the last version of Amibian was devoid of any pre-built configs for Amiga systems like the previous versions had. Since I haven't seen Gunnar in the forums since 2017, I took it on to share a copy of the configs from the 1.4.0004 build, the build itself (in case it isn't available on Gunnar's main site) as well as create a spreadsheet with as much information as I could pull from the Wikis during the past few nights that should help everyone build their own custom configs for all of the Amiga models.
1.4.0004 Configs: https://drive.google.com/open?id=1TwEudwEdUIB0lyjK70Wray2AzfmmoXSk
1.4.0004 IMG file: https://drive.google.com/open?id=1UZ9WYNmItnr5YwdIKefuhoWtT5piAQxE
If you have any info you would like me to add to the spreadsheet, please let me know and I can append when I get a chance. Hope this helps