Varese didn't include this cue on their existing CD of THE MEPHISTO WALTZ, but the film itself contains what I took as a Jerry Goldsmith Tijuana Brass knockoff heard when the Alan Alda and Jacqueline Bisset characters dine in Mexico for an evening out. (This will precede the spooky/erotic cue "A Night in Mexico" if WALTZ ever gets reissued complete and chronological.)
But OnyaBirri meant cues actually included in OSTs released. In that case, even though it's not an original cue, I point to Goldsmith's wit on display in WARNING SHOT, by titling a mariachi-flavored source rendition of "Mona Lisa" as "Tel Aviv Brass (Mona Lisa)." (That would fly past people who weren't already aware that Herb Alpert is Jewish.)