The Rangers of the Grey Company were dressed in dark grey cloaks and openly wore a silver brooch shaped like a pointed star during the War of the Ring. Admittedly this outfit doesn’t feature a silver star brooch, but rather a green star on the chest. I guess that’s as good as it gets in Lotro outfitting.
When Evendim was revamped in the last update, a lot of new quests were added that result in class specific armour rewards. Though the design of the armour is familiar, what is different is that the pieces are decorated with a star. I just had to go back to Evendim with my minstrel to get the minstrel armour pieces, as I think they are rather nice. The boots resemble the Westernesse heavy ones but the colouring is in reverse. The chest resembles the Medium Leather Great Barrows outfit, but has a star on the chest. The boots (and gloves but those are not featured in these pictures) are hard to dye as their hue comes out really different than on other pieces.
Chest: Jacket of the Heartmender, grey dye (Evendim Arnorian coins reward)
Shoulders: Quilted Shoulder Pads, grey dye (Light Armour Smith)
Hands: Leather Gauntlets, grey dye (Esteldin Medium Armour Smith)
Legs: Westernesse Radiant Leggings, grey dye (crafted)
Feet: Shoes of the Heartmender, grey dye (Evendim quest reward)
Back: Plain Hooded Cloak, grey dye (outfitter)