My sister sent me a link to this Etsy shop, Orit Dotan, with really fab buttons!
I think this package of 20 assorted wooden buttons is my fave so far. Aren't they just right for spring?
The shop has more than just buttons, though. "Here you will find vintage and new buttons, beads, trims, laces, sequins and more" as well as button jewelry. Lovely stuff!