Disneyland doesn't have a large Christmas store like the one in DtD at WDW, but they do have a small one in New Orleans Square called "L'Ornement Magique" that sells Disney Christmas ornaments year round.
I haven't really checked recently, but I'm assuming it's still there. It may or may not have been taken over by Princess and the Frog merchandise.
There is also a selection of ornaments available year round in The China Closet on Main Street.