Wanted WW 2 German front Zipper 4 Flight Jacket

[Cooper A-2]

Wanted, ZIPP, Ri Ri, or RAPID WW2,separable zipper for my original German Luftwaffe flight jacket. Length approx. 50cm ++// 19" ++.
Pay premium, since it just broke today on my beloved original Channel Jacket.
Thx for your help.