I looked at the can racks, and they didn't exactly trip my trigger, so to speak. I did get a lot of other storage ideas though, so thanks for the link!
I did a search for "gravity feed can racks" and found
canracks.com for the DIY type people. It looks like the plans they sell will let you build a can rack to suit your needs. Check it out!
Note: I have no connection to the site. <img src="/images/graemlins/cool.gif" alt="" />