From what I understand, they are trying to import them, but there are A LOT of BATF hoops to jump through to get approval, like 3 years worth or something like that.
If you really want a Bullpup, I would go with a Steyr AUG. Steyr is reportedly importing new ones again.
My 2nd choice would be the FS2000. Especially if you want to be able to shoot with either hand. My brother had one for a while, it was very well balanced and shot well it just had a terrible trigger, he didn't like it and traded it for a SCAR.
I am no longer participating in gun forums.