Yeah, of course.
Just open Composer, and if you get a prompt to choose a package type, just click Cancel to get to the main window. You're not going to use any of the standard snapshot methods for this.
On your same Mac, open the Finder to Applications and drag the Composer.app into the sidebar of Composer itself. When you do this, like all other packaging methods, it copies the app or files into /Library/Application\\ Support/JAMF/Composer/Sources/ including any supporting folders, so it will make a copy of itself into that directory. Name the resulting new source in the Composer sidebar if you need to, and then build it into a package.
But double check the owner/group and permissions on it before doing that. Sometimes they come in with a specific owner assigned and you want to correct it so it matches permissions for apps in the main Applications folder, like root/wheel for example. But it should be as simple as that.