Have you tried Country Curtains? JCP, BedBath&Beyond & Overstock are some other places you can try. I assume you're aware that curtains displayed as gathered on a rod can easily be hung with rings, so don't let how they're hanging deter you from buying curtain you like. I just finished making short, unlined panel curtains and even though they were only 63" long I would not say they were easy to make. Sewing them was easy, but cutting them all square was not! Not having a large surface to work from was an issue but at least I had my kitchen peninsula, which still wasn't quite wide enough. If you can find them ready made in the fabric you like, don't hesitate to buy and cut the hem. The iron on tape is fantastic! Here is a link that might be useful: country curtains

I used hardware and trimmings from Houles when I redid my master bedroom. Not a budget option, but lots of pretty stuff to look at if someone wants to splurge ... https://www.houles.com/index.php

Virtually nothing at my local HD or Lowes except a few cacti, grafted moon cacti, and a lot of African violets and dyed Phalenopsis. I've never grown Adenium but am going to start now after perusing the posts in this forum. I really love that dark color and the wonderful contrast and symmetry.

I did a Google search: "burgundy curtains with white linings" and a few options came up. Depending on what your budget is, you may think about contacting JC Penny custom curtains. I had them do a few of my windows and they look great. Another option for you is to put up white sheers on a separate rod and closest to the window. I have them on all my windows - for privacy purposes. They look white from the outside.