If you are making just a few patches for casual shooting take a piece of thin cardboard like the side of a cookie box. use a compass and lay out 1 1/4 circle cut it out. Cut pillow ticking into 1 1/4 strips, then cut into 1 1/4 squares. Then lay Cardboard pattern on square and cut into circles.
For more patches required. Go to a hardware store or plummers supply and get a piece of 8 inch X 1 1/4 inch black gas pipe with no threads. Grind and file an angle on one end till sharp. Use a board to lay 3 or 4 layers of patch material and with hammer cut patches, hyy