I think the best place is online stores which will leave out these boresome questions .There should be non-prescription contacts for people who have perfect vision but still want them as decoration . If you don't know what kind of contacts you need ,they will have suggestions for you .
Actually, it is essential for you to get a prescription to buy ether prescription contacts or non-prescription contacts. This is to make sure the safety of your eyes. However, if you do not want to get a presctipion, you can find some contacts from novelty shops, beauty salons or online shop. Hope this helpful.