Bank of Western Australia has sold its 49 per cent stake in IT outsourcing company Unisys West to its partner, as the bank sorts out its sourcing ahead of the planned takeover by Commonwealth Bank.Unisys West provided many IT services to the bank under a contract agreed in 2002, though the bank has been unwinding that over the last two years. Formed in 2002, Unisys West had a net profit of $3.4 million from revenue of $65.7 million in 2007.Unisys said in a media release yesterday it would continue providing BankWest with hardware maintenance, application maintenance and support, and bureau services.