Scotland boss George Burley says Sunderland fullback Phil Bardsley remains on his radar.
Burley said: "Brian Howard (Barnsley) doesn't qualify for Scotland and Phil Bardsley is one that might be available but I have wanted to keep the same squad together.
"There might be opportunities for other players, especially in May. I have been to loads of games, as have my scouts and assistants, and it will keep on going. You are trying to leave no stone unturned but I feel that Scotland's strength in the last campaign is the togetherness and the great spirit among the lads."