Hoya lithophytica In Short Supply

There is no Hoya that I own that I have more request for than Hoya lithophytica. I get asked almost on a daily basis if I have any to sell and have been told that I am the only source for it in the U.S. I find that hard to believe as I have sold a lot of it over the years and others must have it available as well. Here are flower photos from this morning: