We're breaking our Christmas embargo a second time, but for slightly cheerier reasons this time.

Community fueled t-shirt site Threadless has posted a limited number of a special shirt on Ebay. Those who buy the rare "Santa In The Attic" (a play on one of their earliest and most successful shirt, "Flowers in the Attic") will see the money they pay go directly to young Callum Robbins, who was diagnosed with SMA earlier this year and has seen a flurry of support in the past month.

You can check out the auctions and place your bids here. There's less than a day left on these guys, so act quickly.

Motion City Soundtrack has also thrown their hat into the ring, producing a limited edition shirt in support of the Robbins family.