Actually, Roosevelt dimes have had a few dates move to higher ground recently, so it is not a case where the entire set is absolutely dead in the water.
The remaining coins included in the 2010 Proof Set are the 2010 Jefferson Nickel, 2010 Roosevelt Dime, and 2010 Kennedy Half Dollar. and more »
Coin Rarities & Related Topics: an 1870-S Silver Dollar, an 1817/4 Half Dollar Though it is in some sense a key to a set of silver Roosevelt dimes, it would not take much time or effort to locate a 1949-S dime.