I just installed engineered flooring on my basement, however by code needed to maintain access to our backflow sewer line. The access point is a circle about 5 ¾ inch in diameter located in the middle of the floor. The actual drain is properly covered; however the cylinder extends upward about 8-10 inches to the base of the cement flooring. I now need to cover the hole left by providing the access to the line. I have seen gold covers in some homes; just do not know where to get them… Lowe's or Home Depot do not carry such. Thanks for your help…

Yes, they are structural clean out covers. They come in many dimensions. They are set in concrete and you can actually drive over them w/o breaking them. They are made of heavy duty bronze. They are bit expensive but absolutely do the job.