Looks like this guy has been buying kits for other cars and making custom sets that have the correct number of studs and right size washers on ebay https://www.ebay.com/itm/ARP-Head-Studs ... Swz4FbHqT-
There may be others but these seem to be commonly accepted as working:
ARP head studs; M50 BMW - 201 4302
ARP rods bolts; Honda 1.2L & 1.6L M8 - 208 6001
ARP flywheel; Suzuki M16A - 171 2801
I have not used these and am not endorsing, I’m just saving info for general information here.