"For a limited time tokens can be turned in for a gift at the representative in Bree-town (near the boar fountain) and Rivendell (near Elrond's House), Mirkwood (in Emyn Lum), and Moria (in the 21st Hall)."
You can win this item from the Lottery: Ancient Silver Token Lottery and/or Anniversary Ancient Silver Token Lottery of which you can enter at http://my.lotro.com/home/lottery.