It was part of useful companion in 0.3 but been removed. I'm working on it as an addon but it's not working yet. There is Bannerking apparently who took the idea too but this mod makes a lot of incompatibilities with all other mods.

tell me there is a mod where companions are hired by lords and travel the world and not just stand in taverns?

I might update this one to 0.5.1 when it will be out to give all the last features in UC, but don't expect too much updates. It's a nightmare to keep more than one version up. But yeah Bannerlord 1.1.0 is the most unstable version so far and it brings almost nothing in game ...
And unlike many other modders i took time during the beta to cook a few features that can work on both versions with minor tweaks, so making a few updates for 1.0.3 would make sense in my case.

thank you for this because the new update once again borks my game. I am staying on 1.0.3 until TW get their sh*t together. The game cant even launch for me on the 1.1.0 update is anyone else having that problem too or is it just me?

It should work with any save.

Will this work with a current save or does it require a new save?

It's available like all previous versions on my wiki and it's still on the nexus too, you can look for older versions the 0.4.7 for m&b 1.0.3
Also this version will likely never be updated on the workshop so you should be fine.

@Midnight will you be posting this version for Bannerlord v 1.03 in Nexus so that when the workshop updates I don't lose yet ANOTHER campaign? I am dying to use THIS MOD! lol