Curved Shower Rod

Hello there ... my super said to ensure that the new shower rod spring I get is ... but I want a curved rod for more space ... there such a thing? if so, where can I find?
Thank you!

sorry, I do not think there is, in 27 years in business I have never seen one and thinking, it would not work.

I do not think so, because if you think the pressure would not be there at the end of a curved rod that the rod must be right to create pressure.