Through their career, The Shadows used other people's tunes, but what about the use of their music by other composers?
Here's two examples that I've thought of.
In the coda of The Ramrod's (Ghost) Riders In The Sky, the guitarist uses Hank's Apache intro
In Anrew Lloyd Webber's Variations (written for his cellist brother Julian), the theme of FBI pops up towards the end.
Any more?