Bee hive springs have been available on ebay - the schneider cams springs are just stronger single springs. Those are availabkle direct from schneider cams or engine machine services. There used to be a guy on ebay under the starion catagory that sold titanium retainers and locks machined from nascar engines - lighter for higher revs. I have a set for my conquest motor to go with the tim c monsta banchee cam and o/s ss valves.