I was on Pottery Barn's site just last night I seem to recall (was doing the rounds of PB, SurLatable, Williams-Sonoma) and did a halloween search and don't recall seeing these then. I remember these from last year and think they came in two different sizes. I wonder if the fact that they are on the site now means halloween things are slow-l-y getting added? Pottery Barn has been a big disappointment for me so far this year as far as Halloween merchandise. I have always loved what they carried in the past for the holidays and summer and don't know if this is a reflection of the economy or they have a new buyer selecting merchandise for them to carry.
BTW I bought very similar pillar holders from HomeGoods (would have to measure to see if they are the same) for $12.99. They might not be the same ones as I thought they were more plastic than aluminium but definitely a style copy.