In Search of Swim Trunk Fabric!

I have been lurking in the forum, reading all the tasty tidbits and helpful hints. I am searching without luck for a nylon ripstop type fabric to make lightweight shopping bags for holiday gift giving. I can only find solid colors. Now every pair of swim trunks my kids own have beautiful hibiscus flowers, or sharks, or camo, so where do I find the same fabric for my bags? Anyone?