Agreed that there'd be more StG44 rifles in the Middle East/Africa than Europe although the Russians did seem to have a fair number in their collections as they got used a number of times in movies according to IMFDB
http://www.imfdb.org/index.php/Stg-44
As for the FG42 (and a number of other WW2 German weapons), there is a chance you could get a semi-auto only copy
http://www.ssd-weapon.com/web_en/produkte_en.htm