Originally posted by Mharr:

It might still be available if you're happy messing about with repository id numbers and steam command. https://www.reddit.com/r/Steam/comments/611h5e/guide_how_to_download_older_versions_of_a_game_on

Just a bit late to the party. Jotunn library updated and all big mods etc are working just fine now!

Thanks for the link will keep hold of it for future.