Rodeck Head Studs

I’m looking for some head studs for a rodeck bbc block. I cannot seem to find anywhere. I do not need a whole set. I need 2-8.625 long 2-8.250 long. They are 1/2-13” x 3” threads (w/nub)on block side and
1/2-20” x 1” on head side. Any help would be much appreciated. Thank you.