The song from the first day trailer

What is the song from the rust first day trailer, if anybody knows could you please leave an answer. Thanks.

I know it, I’m searching for name.

[editline]12th December 2013[/editline]

It’s “What Do I Have to Do? [Instrumental Version] - The Hit Co.” It’s kinda hard to find a website where you can buy it.

Any youtube link or something?

I can’t find any.

where did you find it then?