I had a terrible time finding thick rods that were not wood. I finally found 1 1/4 metal bronze rods at Tuesday Morning. Look on their website. The finials are a cherry wood and gold trim look (I say look, because I discovered they are actually made from some type of composite (isn't anything made of natural materials anymore?) after one broke.

I cannot help you on the swivel sockets. There is a poster on this forum that built an all window, breakfast room off her kitchen and she has angled her rods and curtains in the corners. I really love the look. Sorry, I cannot remember who it is. Maybe someone else can lead you to a photo.

Thanks, I will check Tuesday Morning, but I really do need rods that have hardware to join at corners.

Try Antique Drapery Rod Company. They have beautiful rods with lots of unusual fittings. There is free shipping on all orders over $100.

In my former home, I had the 2 inch barley twist rods with the french artichoke finials in silver leaf. They were absolutely gorgeous. (note: rings will not slide on the barley twist)

The site is a little difficult to navigate. For what you want, click on 2" rods, then choose one of the styles that come up. It will take you to another page. In addition to a picture of the style you have choosen, there will be a drop down menu in a box. Click on the drop down menu to see the different finishes the rod comes in.

Here is a link that might be useful: Antique Drapery Rod Company

Is this what you are looking for? See below link.

Do a search for Hinged Corner Elbow

Here is a link that might be useful: ELBOW ROD

Thanks so much for this advice! I will try the Antique Drapery Rod Company and look more into the elbow rod. I wish there was room to just do finials on either side, but there isn't.