Thanks for all the kind replies. Orchid Inn does not show any Hatsue Otsuka's for sale on its website, but the next step in the breeding is available, where Sam crosses his awarded Paph Hatsue Otsuka back to rothschildianum and to S. Gratrix. http://www.orchidinnusa.com/plants.jsp?kind=parvisepalum&type=hybrids
I just got about 9 plants from Sam earlier in the week, but did not get this next generation breeding with that cross. I still love the one that you have.