If you've got a few extra bucks in your pocket, love some of the biggest indie acts making music right now, and would like to help a good cause, you can help make a difference -- and come away with a one-of-a-kind item from one of your favorite bands.

It's all in the name of defraying medical costs for Asa Adams, who was born last year with a congenital heart defect that has already put him through three operations. He's expected to make a full recovery -- as the Benefit for Asa website puts it, "he'll never play football but he will live a long healthy life and have a wicked cool scar" -- but all those procedures haven't come cheap for his parents.

To that end, a number of artists have contributed all sorts of cool swag to a benefit auction in Asa's honor, including Bon Iver, Sufjan Stevens, Vampire Weekend and Of Montreal. The offerings include an assortment of prints, posters and test pressings from Bon Iver, an autographed CD bundle from Vampire Weekend, and a test pressing of Stevens' 'Michigan' album.

Take a look at the full list of items up for bid and act quickly -- the auction ends this Sunday (April 8).