Almost any bulb dealer and many online nurseries have them. You can also get some types at nurseries and garden centers but you won't get much of a selection and the quality is not as good. As far as I recall, though, Asiatic lilies need to be planted in the spring, so you might want to wait to order them in Jan. or Feb.
Here's a link to a good online source from our Green Pages
https://brentandbeckysbulbs.co...