I have an Icons Episode IV, which came without the blade. It’s quite nice and totally fits the bill as a conversation piece.
That said, if you really want something realistic, the best thing is to find an actual Graflex and convert it yourself.
And like others have said, bear in mind that the sabers from III, IV, and V are all different, so you’ll need to decide which one you want. Sabers from IV and V can be converted from a Graflex, whereas with Episode III you’re stuck buying a licensed replica because of the differences.