Got tired of the "close but not quite" ones from autozone.
Did some research and turns out they are:
Head dia = 18mm or 20mm
Stem length = 15mm
Hole dia = 10mm
You can get them on eBay or a ton of other websites like this one.
They are often marketed as fitting 94+ nissan Maximas.
I paid $7.99 shipped for 20.