William, you already provided me with tons of information!
Actually the kind of source that I was expecting is more of the information type. I can't / won't import bulbs for sanitary reasons, but I can always try with seeds. At present I only have the Scottish Rock Gd.Club as a source of Seedex. You've given me a lot of data!. I will definitely look into Globemaster. What about A.christophii?. Are there worthy cultivars of it?. Thanks again!
Arturo