fyi, if you're looking to adapt your current rack, tubus also sells adapters for their racks that you might be able to shoehorn onto another rack:
http://www.thetouringstore.com/TUBUS...ONS%20PAGE.htm





"The photos above are of a quick release mounting system that works with most of the Tubus racks. This adapter allows you to mount a rack on a bike without lower rack mounting eyelets, such as a race bike. In addition, it moves the rack toward the rear of the bike, greatly increasing heel clearance for panniers -- great for bikes with short chainstay lengths. The adapter consists of a longer quick release mechanism, and the curved stainless steel brackets that slip over the quick release skewer and attach to rack. $33.00 Set"