Hi Mark!
Thanks for your reply! :)
I found your film here: http://www.tube8.com/anal/german-teen-forced-anal/8921/
(I hope i'm allowed to post Tube8-Links here)
It might also be helpful to know who the guy is (sounds like he's from Eastern Germany), but even though the themes are quite alike, I don't think these guys are.
At least to me they don't look the same... or do they?
While I'm at it, here are some Screencaps of the Girl I'm trying to find:
I'm still hot for further clues :)