Just searching online, you can find many halloween contact lenses varying in colors, designs and styles. I just search them online and find some. Here are the links: http://www.visiondirect.com/theatrical-lenses/qxc179143
Well, for your needs, I think Original Sharingan Halloween Contact Lenses can be a good choice for you. First, you should know that Original Sharingan Halloween Contact Lenses are designed to be worn about 60 days. Because they are non-prescription, so they will be suitable for all eyes. In other words, it is just fit for people like you who do not need to wear contact lenses with prescription. And you can buy them on http://demoneyez.com/Original-Sharingan-Halloween-Contact-Lenses. Also, there are many other types of non prescription Halloween Contact Lenses. Their prices can be cheap at 29 dollars. So just link in and search for them in detail.
There are many colorful contact lenses online, such as the white, purple and other exaggerated colors. You could go to the ebay to have a look. Or else, the walmart is such a good place to buy the contact lenses because the price there is cheap. You could just choose the colored contact lenses online.
Well, it seems that you are going to buy something like costume or special contact lenses to attend a show. So, as a matter of fact, you can find a lot of contact lenses of different types at Walmart vision center, because they have signed contracts with so many eyewear sellers, and generally speaking, their prices are quite acceptable. Some special designed contacts are also available there.