Gears & Axles - Where to Buy 12mm Screw-in Studs

Car has a Strange axle and it has 12mm studs but they are too short as I have to run a spacer.

Anyone know of a source for longer 12mm screw-ins?

Jegs or summit. ARP and Moroso make them. That's what I'm runnin

Those are all 1/2" - 20. any 12mm you know of? If not, looks like I'll have to switch over.

you should also have holes already drilled on the axles for the .5". That's the way to go anyway. Much stronger.