If you didn't have any better way to spend $149...here's a new one:
Shimano Dura Ace 46T Chainrings
June 2, 2008
"You’ve seen them on the bikes of Sven Nys, Erwin Vervecken and Bart Wellens to name a few and you’ve asked “where can I get my hands on those babies”. Wait no longer. Now available, exclusively at Cyclocrossworld.com, are the Shimano Dura Ace FC-7800 46T 130 BCD Chainrings. These factory chainrings were produced in extremely low quantities for the top Shimano sponsored cross riders. The chainrings are super rare and are in very limited supply. This is one of the best shifting and stiffest cross rings on the market and a perfect compliment to your Dura Ace, Ultegra or 105 10-speed crankset. They will also work on many other brands of cranks for that matter, but they look really sweet on the matching Dura Ace stuff. Why settle for anything less?"
Hmm...any bikes in MI going to have these? (Not mine!)