Skysports.com understands Rangers are hoping to sign Bolton defender Danny Shittu.
Shittu has been linked with a number of clubs during this month's transfer window with the big defender well down the pecking order at the Reebok Stadium.
Turkish side Trabzonspor are thought to be trying to lure Shittu away from England, while some German clubs are also monitoring the Nigerian's situation.
Rangers could now make a late bid to land the former Watford stopper as Walter Smith looks to bolster his squad before the transfer window slams shut on Monday.
Smith has money to spend after offloading Pedro Mendes and Jerome Rothen and he is thought to be lining up a bid for Shittu to bolster his defence.