This mod by Calliecai but without the dependency of the Custom OST mod.
Just throw it in your mod overrides, and make sure to select it in the heist tracks before the heist!
If anything doesn't work, I have no idea, because I just took the music and applied it to my music template
Note: This will not have the features of Custom OST like dynamic volume, it will just be the songs
Updated: songs actually work now