That would be Sport System Dittrich, which makes reasonably priced semi replicas of a number of Third Reich weapons. The problem is our ATF regulations, which require a number of US made parts to enter. There are two companies who have managed to assemble semi MP44s here in the US, but right now this is a trickle. The FG42 is still not available.
http://www.ssd-weapon.com/web_en/produkte_en.htm
Real FG42s skyrocketed in asking price from $60-70K to well over $100K after some guy with more money than brains paid $100K plus for one at a James Julia auction a year or so ago. Now everybody with one wants the moon. I think they will settle back to $100K or less in this economy.