HEMI head studs keith black

Hello. Am in desperate need for 9/16 head studs with 12.5 inches length for a keith black hemi block. ARP does not sell these and keith black has stopped producing them.


please share it would be greatly appreciated!
Or any tips on how to get these would be very nice!

picture of 9/16 stud thats too short (left)
1/2 stud on the right has correct length but wrong size

image.jpg