Small off cut of plaster board (Broadwindsor DT83)

I need a small offcut to cut a circle of plasterboard that’s 6inch / 15cm. Might manage with 12cm.

There is a hole in my ceiling to be repaired. Ideally would use plasterboard due to the size of hole. I’d be very grateful for this tiny offcut.

Can collect for anywhere between Axminster, Crewkerne, Beaminster and Bridport or rural areas outside that area.