Try Smith and Noble. They have lengths up to 150". They are a bit pricey, but they often have promotions. Depending on how long you need, you can also look at JCPenney, they have lengths up to 124". Good luck!

Fabric Hyena has lots of options. I've never asked if they can fabricate over 140" length panels, but you could contact them.

Here is a link that might be useful: Fabric Hyena

I don't know how long you need, but here's some up to 144", ready-made, inexpensive. These also have the back tabs so popular now.
Dee

Here is a link that might be useful: Tuesday morning

Thanks to all of you for your sources...I will check them out. I had no idea that Tuesday Morning had the longer lengths online. I have purchased draperies from them for other rooms in my home..I need 130-132 inch draperies. Just finding the right color could be a challenge. I am looking for a deep rich blue. Once again thanks to you all.