I checked the Hatsan site to see what's new for the US and found the Nova and Nova compact listed. They appear to be an AT44 with a 500 cc 250 bar fill bottle. Like most Hatsans they are a bit heavy at 9.5 pounds and there is no listing of them being regulated in the list of features. Not sure how well that's going to work with a 250 bar fill. Maybe BWalton can work up a review. Didn't see anything on price.
Edit: Adding link http://www.hatsan.com.tr/en_new_nova.html
Edit: Adding link http://www.hatsan.com.tr/en_new_nova.html