I myself have an Anakin Ep3 (very similar to Luke Ep4) Master Replicas, which I bought right before Episode 3 came out. These days, they're sold (even made?) by Hasbro. Of course, you can't really do blade-blade or blade-object contact with these, the LEDs inside the blade rattle to death and you develop dark spots.
The sad story is that these days I know a lot about these things. Some people (not me) get as crazy into the saber building as some here get into arcade cabinet building. Rather than drown you in information, I'll simply link the following sites.