For Pentecostal/Apostolic Christian girls only.?

Well, one of the doctrines at my church is that you have to wear skirts when your baptized ( I am about to start baptism class & I do have like 4 jean skirts). I can NEVER find jean skirts up to the knee for casual occasions. Any stores? I'm a size 2, 3, &4 . P.S. I am NOT trying to exclude anyone its just that Pentecostal/Apostolic girls are supposed to wear skirts and they can relate. Also, I live in a place where a lot of stores are near me so please, feel free to list stores even if you think they might not have it somewhere else. Thanks :)