Hansjorg Wyss, one of Switzerland’s richest men, said on Wednesday he had been offered the chance to buy Chelsea, with the European football champions’ Russian owner Roman Abramovich under growing scrutiny. Wyss, 86, who founded the medical device manufacturing firm Synthes, told the Swiss newspaper Blick that he and three others had been sounded out on Tuesday. But Wyss wants Abramovich to lower his asking price for the English Premier League side. Abramovich revealed on Saturday that he plans to place his ownership of the Blues into the *stewardship and care”* of the Chelsea Foundation’s tru…