Wal Mart carries a line called Wild eyes. But I don't think they have blue cat eyes, they have yellow. (I own a pair) They take about a week to ship and cost about 120.00 per pair unless you buy them in October when most Wal Mart vision centers have a sale for 74.00 a pair.
Another thing, these types of lenses are harder and more uncomfortable for the eye. Some are injsected with color and it makes the lens surface rough and irritates some eyes. Other people have no problems with them. I suggest seeing a doctor and they can let you try on a pair to see how your eyes react to the contacts.
Lens Quest carries red, yellow, green, and white cats eyes. But they have a special thing wher you can order custom made contacts for 200.00 for a pair I think. I highly reccomend asking your eye doctor about these. Ordering online is not that bad, but you need to know a prescription/power(if your friend has one) a diameter of the eye so the lense will fit, and a basecurve. These all depend on your eyes and you should get a contact fitting every 2 years beacuse your eyes grow and change with your body.
I'll look and see if I can find anyplace that sells blue cateyes for a reasonable price.