By Tsvetelia Tsolova SOFIA (Reuters) -Bulgaria’s GERB party of ex-Prime Minister Boyko Borissov looked set for a narrow win in Sunday’s election, the fourth in less two years, as voters sought predictability from a former leader amid steep inflation and the war in Ukraine. Exit polls by Gallup International and Alpha Research showed the centre-right GERB with 23.6%-25.5% of ballots. Its main rival, the reformist We Continue the Change of Kiril Petkov, whose cabinet collapsed in June, was next with 19.5%-19.9%. If confirmed, the result would herald tough coalition talks ahead that could still e…