There is work underway at xda-developers.com to port the Froyo camera to Gingerbread. It's mostly working, but there are still a couple of glitches that haven't been fixed yet. In order to use it, you'll need to be running the Clockwork recovery and install a .zip file (i.e., it's not as easy as installing a Market application).
There are rumors of another update coming in 3-6 weeks, that this release of Gingerbread was an interim snapshot intended to placate folks who were up in arms about the problems with Froyo. If that's true, I would be surprised if that version still has the camera that is in V21e.
A couple of market (paid) applications that people have mentioned in connection with getting back the missing camera functionality are Vignette and Camera Zoom FX. I haven't used either of them, but the descriptions in the Market sound pretty good.