I have some daffodils on my property that I love, but since I didn't plant them, I have no idea of the variety. I would really like to be able to purchase more like them--they don't have to be the exact same variety, just similar.

These daffs are blooming now in my Zone 5 garden. They are about 15-16 inches tall, from the ground to the top of the flower. They have the classic daffodil shape, with the petals and trumpet of about equal length. They are a clear bright yellow and the trumpets face upwards. The two most important criteria for me are the color and the orientation: I prefer them not to have too much of an orange tinge, and I really dislike daffodils that nod too much. (I used to have some that looked downright embarrassed to be blooming.) The least important factor is the height; I don't mind if they are taller.

Can anyone suggest varieties I should look for?