My book has 1056 aircraft and 1378 crews as of August 1945.
Of that 528 aircraft were lost, 414 to combat, 104 non combat, and 10 lost in route from the USA. The losses were for April 1944-August 1945. Anouther 34 were lost in the Korean war.

From B-29 Superfortress by John Pimlott

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