By your description, you have a Master Replica Anakin lightsaber from Revenge of the Sith. While it's canonically the same lightsaber that Obi-Wan gives to Luke, in the movie it was a very different looking lightsaber. As you said, it has straight bunny ears, the thumb button is gold, instead of a glass eye it has gold eye, instead of a clamp lever it has a gold switch, instead of a bubble card it has a gold electronics-looking card.
This is good for you because it's rarer and usually more expensive secondhand than any of the actual Luke ANH Force FX lightsabers. (Hasbro or Master Replica).
Pictures and a link for the Anakin lightsaber.
Anakin Skywalker ROTS FX-Lightsaber (2005) - Saberproject - Everything aboutWhat's your budget for a Luke ANH/ESB lightsaber? Are you looking for a static prop or one with light & sound too? Honestly, the actual Luke ANH Force FX is accurate enough for 99% of people out there. If you want the blade removable, there is a conversion available for that (which I've done a couple times and am about to sell one). You can pickup Luke ANH Force FX lightsabers NEW for $130 in stores.
If you're looking to spend $200+ on a static prop, the hilts already mentioned by others are excellent. Electronics will run you another 200-300, so you'd be looking at $400-600+ for the whole thing.