Soccer shorts generally do not have a long length.  The longest inseam I can find are about a 10″, which is not very long. I hope I’m not off base, but I suggest you go with basketball shorts.  I think it’s better to have longer shorts to avoid the “bird legs look”, then to have the so called “soccer shorts”. The basketball shorts have longer inseams and look similar to many styles of soccer shorts.  Here are some I suggest:

Hoop Shorts 12″ inseam