Making your own down item is an experience! I suggest googling for tips on working with down. It's not easy.

Quilts are like sleeping bags, minus the zipper and hood. Most will have a sewn in footbox, some allow you to open the quilt flat. I prefer the latter. Jacks R Better and many other cottage gear quiltmakers do quality work. LeighLo does hybrid down/synthetic quilts, others have synthetic models as well as down.