The Buddies are the Premiership's lowest scorers with just 11 goals in 15 games this season.
But Goodwin knows he can't go and splash cash on a proven goalscorer with so many options still at the club.
Jon Obika and Danny Mullen have both scored three goals while Junior Morias has one. Cody Cooke has also scored once but hasn't played since July because of a knee injury.
And Goodwin said: "When the January window comes maybe we'll be able to add a couple of real bits of quality that might make a difference.
"But we're already very top heavy in terms of options in the squad. Jon Obika has been starting regularly, and we've also got Danny Mullen, Junior Morias and Cody Cooke. And then you add some of the other attacking options.