To get another daffodil like this would require propogation by vegative means rather than seed. There is a method called twin-scaling but this is complicated. You could mark the position of the daffodil and during a dry, summer period lift the bulb and see if it has produced any side bulbs. Carefully remove these and plant up again. The smaller side bulbs may take a year or two to flower.

If not wait until sutumn when the new daffs are in the shops and see if you can buy some more take the picture with you.If not get in touch with a spring bulb company