Quark traveled to the Ba'ku planet wanting to build a spa or something. I think the footage showed up someplace. (SE DVD maybe?)
I'm sure the Ba'ku were thrilled to have a Ferengi in their midst.
That scene would have been so wrong.
The whole point was that the Ba'ku wanted to live alone and undisturbed. The Federation was intruding on their lives in order to make a profit. Having Quark show up at the very end as a joke would have meant that nothing
changed and that the Ba'ku were doomed sooner or later anyways.