Duane Eddy's based out of Nashville, and Brian spent some time there (in Franklin, TN - outside of Nashville) in 2005 recording Rockabilly Riot. I wonder if that's when the recording session with Duane Eddy took place. I think the following year (2006) Duane performed the Peter Gunn Theme with the BSO at the Ryman.
In searching Duane's discography, it doesn't appear he's put out an album, other than reissues, in quite some time.
This is the kind of thing that would be terrific on a Setzer compilation/boxed set! Duane would also be a killer guest on any Setzer project - even the film noir thing coming up!
Twang-a-billy