Looking for something similar to Forever Broke by The Seatbelts
 

If you've never heard the song I recommend google searching it and giving it a listen. It's from the Cowboy Bebop OST.

I'm running an rpg game where I want to play a mixture of instrumental jazz and blues in the background.

In particular I would like to find something along the lines of this song though. Something with just acoustic guitar and maybe some harmonica with kind of a old west feel to it.

If you have any recommendations let me know. Thanks!

I wish I had a few titles to throw your way but my knowledge of jazz is limited to the milestones of the genre. Just the same, I had to give you props for digging the Cowboy Bebop OST - that's an album I wish had been reissued on vinyl!