Boss Jim Magilton has confirmed that he is still looking for a loan defender despite Pim Balkestein and Ben Thatcher making progress as they recover from their injuries.
The Dutchman, who has had a groin problem, could be back in reserves action at home to Southend on Tuesday, while Thatcher, who tore a calf muscle in the game against Wigan, is still a few weeks away from a return, but is set to step up his training this week.
Magilton said: "Pim coming back gets us back on an even keel in regards to left-sided defenders, but I still feel we need cover as we are not sure about Ben.
"We are still asking clubs if we can get one or two of their players, but I don't blame them for not wanting to let good players go.â€Â
Earlier in the week, Stoke's Ryan Shawcross was again linked with the Blues and Derby County.
The Town boss has also confirmed that second-choice keeper Shane Supple is coming into his thoughts with Richard Wright having made a number of mistakes this season: "Shane is very close to playing because Richard has been indifferent.â€Â
Supple's only first team game this year was the Carling Cup match against Leyton Orient.
Elsewhere, Town associate director Michael Spencer has reportedly lost almost £500 million in the recent financial turmoil. Spencer, whose wealth was previously estimated at around the £1 billion mark, owns around 15% of the PLC which holds a 12.5% stake in the club since last year's takeover by Marcus Evans.