So not exactly for sale, but I've talked to ARP about getting some 6 bolt head studs in 625+. They guestimated USD $630 to make the studs (plus nuts and washers) for a single set. They do not want to give me a final price until I tell them how many sets I want. There is a price break at 5 sets, so if anyone is interested in getting a set please let me know.