Three or four years ago while trying to save money at every turn we got a little crafty when hanging cafe curtains in the kitchen and bathroom. I simply had rods cut at Home Depot out of hollow tubing. I also found the cups they sit in at Home Depot as well, but it has been so long I can't remember what department they were in. Probably near the pipes. The clips were super inexpensive from I believe Bed, Bath and Beyond. In fact, now I am not sure they are even meant for window purposes but they worked for us and I like the simple, industrial feel of it all.
I still liked the look so much that when we did the bathroom I did not change it out for a proper rod. As they say, "if it ain't broke don't fix it".