This is Yamaha Germany:
http://downloadshop.yamaha.de/index.php?cmd=catalog&filterBy=Song

Look for the format XT2 for the T2 which uses Megavoices and SA voices. XT is for T1.

Here a Danish site:
http://www.midispot.com/da_music_shop.asp?fInstrumentId=20&fProductGroupId=8

One more German site, but not quite as good:
http://www.d-o-o.de/4,15-ck-tyros-1-2-psr-s700-s900-psr-3000.html

All of them have short samples to listen too.

Eric