Does anyone know some legal source to get these species?

Both of these are very difficult to grow and produce seedlings to maturity. Orchid Inn has flasks of randsii http://www.orchidinnusa.com/flasks.jsp?kind=paphiopedilum&type=species

I know of nobody that has Paph wentworthianum or similar related paphs. They are rarely found and/or produce seedlings.