Unfortunately most of the spicerianum on the market are tainted. The hybrids grow better and look better so they were selected by breeders over the true species. I wrote a blog post about this, not sure if I have already posted it here:
Paph spicerianum
We are maintaining 2 breeding lines of the species with clear providence to jungle collected plants. Unfortunately many other breeders don't really care. I know of one who just bought a bunch of seedlings knowing they are not pure. He basically said that they were close enough.
Dave