Yes, the support can be installed where ever you need it.
Yes, this rod can be cut to length.
Not sure I understood your question. They come already with brackets and I used them. Very comfortable and reliable. I am satisfied. Gemma
Thank you Mike for your recent inquiry with The Home Depot about item: Kingston Brass 64 in. x 27 in. Corner Shower Rod in Brushed Nickel (including ceiling support). We do not carry that item separately. You can contact the manufacturer, Kingston Brass, to see if that is an item that would be available for purchase. Thank you for choosing The Home Depot.
No, it is not possible to add length.
Yes, I mounted them vertically.
Yes, this shower curtain rod is solid brass.
The short length is 26.5" and extends to 27.5".
Yes, it can be cut shorter (trimmed).
The ceiling support measures 36-5/8 in.