There is this:
Memoirs of a Stuka Pilot Hardcover – by Helmut Mahlke (Author)
http://www.amazon.co.uk/Memoirs-Stuk.../dp/1848326645
Which is the English reprint of "Stuka: Angriff--Sturzflug".
It covers Mahlke's time with the unit until around August 1941. However it does have a loss list for I/186 and III/1 from the start until the end of the war.
I have a copy in German and also a copy of his original manuscript.
/Ian