You could try vapecrawler.com, to see if anything pops up although that is a major specific request. Metavaper.com might also potentially be of use.
I would suggest searching some of the larger China sites like Fasttech or something, I would do a search for you but my FT search skills are pretty pathetic. I'm usually the one asking for "where can I get a?" although you may have more luck with someone else who happens upon this thread and is like, "Why, let me do that fasttech search for you," and you are (if you are me) all like "Wooh, woooh it is indeed a good thing that all people are different an also have different skills, thank you, today, God for the infinite variety of the human race which I sometimes also curse at."
Although seriously, like good luck with it.
Anna