The 24-year-old hitman wants to remain in the Football League following the Shots' relegation and is reportedly attracting interest from a handful of other clubs.
Alex boss Steve Davis told the club website: "Danny is a player we have looked at. He has been linked with other clubs as well so we know we face competition.
"He would be a great asset because he has a lot of strengths and we believe he would improve if he did come here.
"Crewe is a coaching club and players do improve here, as the ones we signed last season have shown."