The Esseles Sentinel chest piece is very similar. But I think the Peacekeeper set from Synth is the closest match, or perhaps Knight’s Crusade by Synth's also. Those are both Heavy, but there are some that look very similar by Synth for medium too if you need that (Blade Master and Sentinel). And as far as I know, the Jedi Battle Expulsor Chest is still BOP from the Gree questline.
Hope that helps.