I've never seen L. neilgherrense available anywhere either, but thought it might do well in Hong Kong. I hope you might eventually find some seeds or a bulb to try. While I've tried L.philippinense from seed - it's on the RHS Lily Group seed distribution list this year - I haven't had success with it yet and wondered if a warmer climate would suit it and I haven't had the chance to try L. wallichianum. L. nepalense! Just doesn't like our wet winters. Oh well. so many other species have given such a great reward, like the beautiful tiger lilies. If we plant enough seeds we find the lilies that like us.