I am not sure what you mean by "winter sowing" :-) Winter sowing is usually a practice reserved for seeds, not bulbs. Lilies can certainly be planted in the fall when other spring blooming bulbs are planted and they are often available by the same distributors.

Otherwise, the Puget Sound area is home to a least 2 large lily specialty nurseries, both of which offer online bulb sales - B&D Lilies and The Lily Pad.

Your absolutely right about winter sowing even now " winter sowing " keeps coming into the front if my mind. Thank you for the list i was on google last night and still i never saw these, wonderful. Thanks again! :)