Anyone got e-mail address for H.P. Wyssmann of Switzerland: Porsche Gmund expert

I am researching the early alloy bodied Prosche 356s from Gmund before I tackled reading this new book on early Porsches. I heard H.P. Wyssman of Switzerland is the expert on the early 1949 cars. I was wondering if anybody has his e-mail , home or shop>
PS So far the most interesting one is from Norway where the Porsche engine was used to power a sawmill! Another was owned by a relative of King Farouk of Egypt
Like to hear about any barn finds in Gmund coupes