Ex-Johnsonville sausage executive to auction Isleworth mansion. It could be yours for $7.4 million Ex-Johnsonville sausage executive to auction Isleworth mansion. It could be yours for $7.4 million January 7, 2021 dzadmin Comments 0 Comment The Isleworth mansion of Launa Stayer-Maloney, daughter of the founder of the Johnsonville sausage company and a former executive with the firm, is planned to go for auction at the end of the month.