well, it depends. What kind of wishes are they??? I can point you in the right direction for luck, love, wealth, etc. but there's not really anything too specific that I know. For example, maybe a chance encounter spell if you're looking for someone, but it's not as if you can toss a coin in a fountain and meet bill gates or something... If you just want a wish spell in general, I would recomend checking out Akasha Wolf. I'm pretty sure you can find her four winds wishing spell under the videos section of this site... Sorry for the long message, hope this helped!
I would like to point out that all spells are wishes. With a spell, you are sending out energy with the intention of accomplishing a goal. A "wish spell" is a bit redundant. You can write your own spell (Lark has a pinned forum post on how to do it) for whatever you want to happen.