By Valentina Za and Andrea Mandala MILAN (Reuters) – Italy’s third-largest bank Banco BPM has occupied a special place on the wish list of Andrea Orcel since the veteran dealmaker took the reins at UniCredit last April, several sources have said. Fruitless negotiations with Italy’s government over a possible rescue deal for state-owned Monte dei Paschi stopped Orcel from making a move for Banco BPM last year. The chief executive was about to launch a takeover bid in February when a leak sent Banco BPM shares flying and a few days later Russia invaded Ukraine, derailing his plans for now, sourc…