Moore was frustrated in his attempts to bring in a replacement during the recent transfer window after top-scorer Jake Cassidy returned to parent club Wolves at the end of his loan spell.
Moves for Sheffield Wednesday duo Chris O'Grady and Gary Madine and Norwich's Chris Martin fell short, but Moore will continue his search when the emergency loan window opens on Thursday.
"We're still looking, there's no doubt about that," he said. "That's the area where we are a little bit short, in height really more than anything.
"We've got a lot of pace there with Michael O'Halloran, (David) Amoo, Akpo (Jean-Louis Akpa Akpro) and young (Cole) Stockton.
"So we just need something like Stockton - big, tall, strong. We thought we had Chris O'Grady last week but he turned us down and went to Barnsley.
"We've enquired about the lad Martin who's at Norwich but we can't afford to bring him in unfortunately and (Gary) Madine at Sheffield Wednesday as well we've enquired about.
"So we've knocked on all the doors but we just haven't been able to get somebody to come in yet."