I've been meaning to do more flower models for some time now since my tulip model has been so popular, but haven't gotten around to it. Well, here is my daffodil model.  Unfortunately, I don't think that I can make it as printer friendlyas the tulip model, but in interest of making it more printer friendly,I have included a four part model as well as the two part model.

You can view and download my tulip model here: 

It features the same twist lock system as the revious model. However if using the four part design I only included indexing features on the additional parts as I believe they are too small to effectively use the twist lock system.  If you make the four part daffodill, you'll need the stem f your choice, the upper stem, the petals, the corona and some model glue.  Otherwise, you just need the stem of your choice and the daffodil flower.

I also included a stand if you wish to use that and several variants of the stem if you want one thats a little shorter or without the leaf.  I also have a vase model that you might like as well.

This was modeled in solidworks.