Source for standardized audio files for an experiment in German
Try this:

http://translate.google.com/translate_tts?tl=de&amp;q="1"


or this:

http://translate.google.com/translate_tts?tl=de&amp;q="11;27;39;81;32;53"


At the moment, I can't test if it pronounces the full numbers right, but I hope it will work.

I think the pronunciation of higher numbers are better if you write them like this: NineHundredSixtySix