Yes, of course they do. The original manufacturer open-sourced the design years ago, was a guy over on Amibay making knock-offs right up until recently, maybe he even still is. He made copies of the original Thylacine (with one USB port) and also a "Mini Thylacine", which had two ports, or four, I think it was four running off a header... don't remember off-hand but there was tons of pictures posted in the threads on Amibay.
As far as "how did they work"? Well, I had one of his Thylacines, and it *sucked* in my A2000. Would completely bog the system down as soon as you plugged in any device. Spoke with one other A2000 user who had the same problem. But this was a Zorro-II issue not a Thylacine issue. I sold mine on and traded up to an X-Surf 100 with RapidRoad module, and couldn't be happier with that combo. Something about how the RR handles devices that the much older Thylacine couldn't, blah blah, TL;DR. Thylacine works fine if you have an A3000/A4000, but RR or Deneb or other options are better.
