Mostly people are still just ordering them from Europe. Places like Seedsman or Sensible Seeds ship to the US, but obviously that's got some risk associated with it. There's a company in Oregon that sells them. They are called Southern Oregon Seeds. I haven't vetted the quality of their stock. The best options is probably the Seed Vault in Southern California . They carry a lot of well known brands, like Crockett, Gage Green, Loompa, Archive, Bodhi, and CSI Humboldt. Their website is http://www.holisticnursery.com/.