By Toby Cudworth & Ben Jacobs West Ham United believe Aston Villa’s valuation of Jhon Duran is too high, sources have told 90min, while a deal for Southampton’s Kyle Walker-Peters could still happen after initial conversations were held before the Premier League’s PSR deadline. The Hammers began actively working on a deal to sign Duran last week, with the 20-year-old keen to leave Villa Park in order to play more first-team football. Aston Villa manager Unai Emery is happy for Duran to leave – he serves as understudy to Ollie Watkins and is impatient to wait for game time – but the surprise Ch…