I’m getting a lot of mileage out of the story about Dave and Kristin’s lovely mid century modern living room. They used J.C. Penney’s Supreme pinch pleat draperies on their windows. A commentor said these have been discontinued, but I’m still seeing stock available online. I also like the look of the Jewel Tex III, but I’d really need to see the fabric in person… In any case, it’s really hard to find pinch pleat draperies for sale off-the-shelf. JCP has the biggest selection that I have found so far. Also, they offer free ship-to-store, and if the purchase isn’t right, you can return the drapes via mail or take them back to the store (even if you ordered them online.)
JCP does not call out “pinch pleats” as a standalone category on their website. You must type “pinch pleat” into the search bar. Also, never buy curtains full price. There’s always a sale soon enough.