So you need a short piece in order to complete the timing ?About some modern stuff ? You have baroque, classical and romantic, but no modern or contemporary.
Regarding Beethoven Op.10 No.1.I do not know the sheet music, but I thought the 2nd movement is around 9-11 minutes?Are there repeats not happening?Under 7 minutes seem frightfully fast for Adagio Molto.The rest of the timing seems about what I'd expect approximately.Also I am sure 30 seconds is not going to make or break your results to be honest.