Thanks for posting the pics, Christy. This is sort of what I was picturing before. I understand what you're wanting to do - but I'm just not feeling it as the space looks so small. Is that the toilet just to the left? Between towels, shelves and a curtain - there'll be a lot going on.
But if you are determined to give this a try - how about a series of decorative hooks screwed into the slope that the curtain attaches to by way of button holes or fabric/ribbon ties. The hooks would have to have enough of a curve to hold the fabric. Large eyehooks would also work. These could be painted to blend into the wall color, or to match your other hardware.
Keep in mind that the higher the mount, the less length of curtain you have to swoop back to the side if you go w/ something store bought.
"I can read and write if that's what you mean. I'm not thick or anything just don't ask me where the commas go."
Incendiary by Chris Cleave