Could be. Some of the info on lightsabers in the EU is confusing and contradictory (is the saber plasma? optical? force field trapped "pure energy"? etc), but at least a couple of sources seem to indicate that a person could just synthesize the necessary crystals for use in the saber. So why couldn't a well-funded group just start up a saber factory?
There could be all kinds of reasons.. perhaps certain crystals are better than others for the purpose, or perhaps obtaining the natural crystals is cheaper than manufacturing them. Who knows...
If you're right though, that's an interesting idea. They'd need at least a few of the suckers lying around to supply all those saber-users. ; )