Don Giovanni Catalogue Aria - Who sings it in the Sci Fi film "Screamers" ?

Good evening,

In the Sci fi film "Screamers", there's a scene where Peter Weller is listening to the Catalogue Aria from a recording of Don Giovanni.  I've been trying for quite a while now to find out who sings it and whether the recording is available to purchase.  There's no mention of it on the IMDB website and Google hasn't come up with the answer so far either.  I also asked the folks on the What Hi Fi forum last August but they're still pondering the answer.

Here's the YouTube clip :

http://www.youtube.com/watch?v=KQeOyclGaVA

The closest I've found is Otto Edelmann in this clip : 

http://www.youtube.com/watch?v=5n4CkgXHQDs

But it's not quite the same.   The tempo and vocal tone are are about right but the pronunciation of certain words is different so I don't think it's Edelmann.

Does anyone have an idea who it could be ?