Fancy a collection of composers' busts? Schubert, Mozart, Beethoven, Haydn, and the rest of the gang can be had at Souvenir in der Hofburg. While you're at it, you might want to go for a ceramic figure of a Lipizzaner stallion, too. It may not be an Augarten original, but it's certainly more affordable.
Hofburgpassage 1 and 7, Vienna, A-1010, Austria