Brent and Becky’s Bulbs sells all kinds of bulbs–daffodils, tulips, crocus, hyacinths, etc. It’s a third generation business, following after Charles Heath, and then George and Katharine Heath’s The Daffodil Mart. They issue two catalogs a year: one for those bulbs you plant in the spring, and one for those, like daffodils, that you plant in the fall.
Search online for their semi-annual catalog: Brent and Becky’s Bulb catalog