I had a look at their site. They have it listed as 'out of stock' and don't even have a price on it. Says they require the full amount by October 6th. I'm assuming that they just haven't finished putting all the details into the listing yet, rather than they are literaclly 'out of stock'.
I was interested in it until I found out the size. If I'm getting Unicron I want the huge official one, not the tidgy 3P tacker.