Isle of Skye Board Game, missing 2 $2 coins

Isle of Skye Board Game, used and in good condition. For 2-5 players, best for 8+ years old and takes about an hourt to play. All the pieces and instructions are included except two $2 coins are missing (there are supposed to be 20 and 18 are included). Outside box is in tact and shows very little signs of wear. The bag inside is in perfect condition with draw string in tact.