Help, shaft broke at entrance to gear housing. I really need a new/used shaft. Or any alternatives that would work. Please reply, thank you

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My friend bought this 1941 Super Deluxe Sedan Coupe. When he was getting ready to load it on the trailer, he broke the vent window handle shaft so that might be a weak point. I had a NOS assembly I gave him with the understanding if he ever sells the car I get 1st shot. He's younger than me so it'll probably go the other way....