Wheel lug stud 1964 Valiant

Hi all, I'm new to the forum and I'm having a hard time finding the correct part or correct info on rear drivers side wheel lugs for a 64 valiant. I learned the hard way that the originals are left hand thread. I'm trying to replace all five on the back wheels. All the places I've checked seem to call out Dorman 610-186, but as you can see in the photo, the splines don't match. Original has 36 splines, dorman part has 24. Does anyone have any insight? Thanks!

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