Providing additional "Buy" links to an al

Hi,

i just spotted that if we click on an album, we can see a 'Buy' link which usually redirected us to eBay, Amazon, and other places. The thing is that several unsigned bands still don't have that album on that marketplace, therefore I've been contacted by the band to help them put a link to their official store, is it possible ? I'd say, this can be a helpful effort for them :)