Pretty much a Ford part. They are likely TTY stretch one-time-use bolts and commonly not found but at the dealer. if you use a regular bolt you have no idea how tight to tighten it, TTY torque specs do not apply to regular bolts and will fault your install. Being mains I would not go there at all.
ARP might make some that use normal specs and are reuseable.
ARP might make some that use normal specs and are reuseable.
