Can't find the correct wheel stud

[79vette]

I run 1.25" wheel spacers on the rear axle on my K5 to keep the tires out of the body tub.

One of the studs got messed up, and I am having a tough time finding a replacement. Needs to be 7/16-20 thread, 2" under head length, ~0.555" knurl diameter.

The closest thing I can find is Dorman 610-096.1, but its too short at only 1.4375" and will only engage ~6 threads. I would like to have 1.5 times the stud diameter engaged, which for 7/16-20 would be ~13 threads. I've tried searching on and calling the various auto parts stores, but am not having any luck. Does anyone have a parts catalog that lists what I need?