X2. If you're looking for something closer to home, you can try NOS Reproductions in Komoka Ontario. I got the replacement headliner for my '84 Monte SS (non T-top) last year. They source the ABS headliner backing board, then I sent them a sample of the material from my old headliner, which they matched as closely as they could (I can't tell the difference), then covered the new ABS backing board with the matching material. With the new ABS material, the new headliner is much easier to handle, with way less worrying about bending or breaking it. As GNX418 said, make sure to get new retainer clips. Chances are that you'll break a couple of the old ones taking the old headliner out. Good luck.
I had mine done at an auto upholstery shop that Chris "Turbolicker" uses & the guy does nice work. Fabric matched perfect & Visors are made & sewn together right there. Drop it off & done by days end. Marlee Upolstery around Dufferin & Lawrence area. Not cheap but great work! :yup: