Charlton Athletic, Brentford, and Swindon Town all also showing an interest.
Emmanuel plays for National League side Bromley, and has scored an impressive 16 goals in 22 games already this season.
The Whites' interest is also held by Championship sides Charlton Athletic and Brentford, along with League One club Swindon Town.
Bromley currently sit 11th in the league, which is one below League Two on the football league ladder.
Emmanuel is by far the club's most prolific player, with the closest of his teammates to his strike tally has five goals, 11 fewer.
Given the current success of Jamie Vardy for Leicester City in the Premier League, who was playing non-league football just four years ago, there could be extra interest in the lower divisions this coming January, with clubs seeking to bag a bargain.
Emmanuel is 26-years-old, and played for Brentford early in his career, but he has played in non-league since leaving the club in 2010. He was named by The Sun this week as one of five non-league players who could be destined for the top.