The Championship promotion chasers have been linked with a number of strikers.
“We are in the market for at least one more,” said the head coach, who is preparing for Saturday’s trip to Sheffield Wednesday.
“But let’s remember who we are - we won’t spend millions.
“If it doesn’t happen I am totally happy with the options we have now. This group have done well so far this season and deserve to still be involved.”
The promotion of Under 23 skipper and midfielder Regan Booty means Wagner has 25 in his first-team pool.
“I don’t like to work with too big a squad,” he added. “I like players to feel that they are a part of the group and a potential starter.”