Any idea where I could…

Any idea where I could find Chinese slippers like these, cheap? I'm having trouble with my google-fu. We're trying to be a mostly no-shoes house, and I'd like to have a few pairs of these available for guests (along with some slipper socks). I'd like to protect my wood floors, which mark up pretty easily, but I also want guests to be comfortable. And, please note, should you ever be a guest at my house, and would prefer to just keep your own shoes on, that's really okay too. I'm mostly trying to minimize the amount of mud coming in.