Call Cdan and get the right ones. You would be insane to put aftermarket ones on there.
Also, it would be VERY wise to replace all of them while you are in there. If your rotors are in need of replacing or resurfacing, now is the time.
I recently had a 4 Stud failure about 100 miles south of the border into Mexico.
I am blaming it on the previous owner overtighting them because they showed signs of a cone and cup fracture where they broke.
Long story short, once i limped home from Baja, i IMMEDIATELY ripped the entire front end apart and replace ALL 12 studs with OEM units from CDan and then torqued them to spec. Since i am over anal about certain things, i also ordered all 12 for the REAR and will be replacing those shortly.
If you had seen the road where my let go and the situation we were in, you wouldnt even hesitate to replace with OEM.
If my wheel, had fallen off, there is NO DOUBT in my mind, i wouldnt be typing this right now!
Point of my ramblings is that studs are not to be taken lightly. There is a REASON that one broke!