Is it possible to safely install a rear rack on a bike that doesn't have seat stay mounting points? There are eyelets down by the dropouts but no mounting points on the seat stays. What are my options for mounting a rear rack? thank you!

I don't want to drill into my bike. I'm thinking p-clamps like this: http://www.bikecommuters.com/2008/07...-your-friends/

Any thoughts?