We initially needed one replacement backrest, as the wood cracked when it was leaned against it. After a second one was broken, I ordered two backrests. We received them quickly. While the dark gray was not in stock, I used the dark gray cover from the broken backrests and replaced the light gray we received. I had asked about getting only a replacement cover but was told I would have to get covers for the entire seat (base, backrest, and cushion). In our case, it would have been better to get an individual cover for the backrest since that is what we needed.