300/440/550 Old Skool A1-A2 Crank Question

Does anyone have any links or references to find a rebuilt A1-A2 440/550 crank? Mine is all scored on the oil seal surface and isn't even good for a core :confused: Even better does anyone have an old one for sale? All the ones I can find are the newer version where the PTO coupler threads onto the end of the crank. Mine is the first generation where the PTO coupler incorporates the final oil sealing surface and is bolted to the end of the crank.

Any info is appreciated.
 
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