Originally Posted by CrossChain
A good, cheap NOS Shimano rd will probably be my easiest bet.
Agree. Try to find a 9-speed 105 rd. They are good, durable and were available real cheap as soon as 10-speed 105 showed up. BTW, any shimano rd from the 7-speed era to current 10-speed stuff will work (with the exception of pre 9-speed Dura Ace).