Any experts on WW1 German Imperial flight gear jackets helmets goggles gloves

[Cooper A-2]

Just wondering ...any experts, takers on WW1 German leather flight gear lke " Döberitz Fliegerhelm" like leather flight " Fliegermantel" "ZEISS Flieger und Kraftfahrerbrillen", leather gloves, and a lot of other leather flight gear from Imperial Germany.
Please PM if interested and expert about this difficult subject. Have a lot in a big wooden crate.