Hey guys, need some help when I bought my last rb motor it had arp head bolts in but one bolt is missing

so im looking for one arp head and cant seem to find one any ware, can any body please assist me?

My LuGnuts have more torque than your honda.
EX=toyota corolla 160i 93'model
Current car=s13 200sx with s14 motor sr20det v.v.t.