Storage system for thousands of CDs and DVDs

voma writes: My husband works for a firm in New York that receives customer data on CD and DVD. After copying the data to their server, they are required to retain the original media for several months until the job is delivered and the customer has approved the work. It is common for the firm to have 30,000 CD's and DVD's on hand at any one time. They are struggling to find a better storage solution than what they have now as the current setup is awkward and requires quite a bit of space. They are removing the media from the jewell case and slipping them into one of those large notebook style disk holders and then storing the notebook on a shelf. I have spent quite a bit of time doing web searches for CD and DVD storage but nearly all the racks that I find are low capacity ones intended for home use. I have found one vendor called Can-Am that makes a high quality steel drawer system that might fit the bill but before I proceed I wanted to ask the Slashdot community for information about any storage system idea for holding tens of thousands of disks in sleeves. Thanks in advance for your help!