Instrumental Disco track from "The Jerk"

[MusicMixxerMan]

Hey folks.

I would like to identify the upbeat, frenetic, instrumental Disco track from the 1979 Carl Reiner film The Jerk, starring Steve Martin and Bernadette Peters. I've always wondered whether or not it was a library track (of which I've come across much Disco), or if it was composed specifically for the movie. Have at it!