Independent mod repositories like ModLand or ETS2ModWorld often host the latest .scs files for manual installation.
Watch a demonstration of the Hadley Horn Pack in action to hear the different sound profiles available for your truck: [ ETS 2 1.43 ] HADLEY HORN PACK | UPDATE Transports 24 YouTube• Mar 15, 2022 HADLEY HORN MOD ETS 2 1.43
You can find various versions of this mod through community hubs: HADLEY HORN MOD ETS 2 1.43