I have a 4" round backplate sconce I need to install. The receptacle is a standard rectangular single gang box. I'm having a tough time finding an adapter plate, ideally black, which will A.) Cover the duplex and B.) Attach the sconce to.

On an approx 70 year old cabin, outside I need to fix a grounding cable on an 100 amp service. It used to connect to a grounding rod via what i believe was a ring terminal. The terminal was held onto the grounding rod via 3/8" bolt. The wire looks to be 10 or possibly 8 awg stranded. The ring terminal is long gone and I found the wire wrapped around the bolt and screwed down. What is the best solution? Replace the wire with something newer (what gauge, it's a 6 foot run straight up to the box)? I need to keep the grounding rod setup (and would prefer to use the 3/8 winged bolt connection). I would reconnect the existing wire, however I'm having trouble finding a device I can attach the wire to that also has a 3/8" hole to use the existing hole. I've found copper lugs that I could solder the wire to but none that have the smaller gauge wire size w/a 3/8" hole. If replacing the wire is best, I would prefer to keep stranded for aesthetics.