Sunderland have been urged to sign a League One striker this month. Despite landing four in the summer, Sunderland are still on the hunt for a new striker in the January window. The Black Cats are said to be keen on signing Bournemouth’s Kieffer Moore and are already in talks over a potential move. However, the Wales international is likely to attract a lot of interest and it will be tough to win the race for his signature. Michael Beale’s side have also been linked with Sam Gallagher, who has been the subject of bids from Ipswich Town. However, the 28-year-old’s goal record is hardly going to…