Composite Railings

I have a wood frame house that dates back to 1899 in South Slope. It has lost all its original detail. While the original porch and stoop railings were wood, they were replaced by mass produced iron railings in the 70s. I am looking into replacing the now rusting iron railings with white composite railings, does anyone have any suggestions / recommendations about what type of composite railings to buy?
Thanks for your help