Try Jack First-

Jack First Gunshop - First in Gun Parts - Rapid City, South Dakota

They have the ability to reproduce parts that are no longer manufactured. I was looking for an ejector rod for a Colt Anaconda a couple months ago and nobody had one; finally called Jack First and they had a couple that were "brand new" (they had an original and copied it). I have to say, their reproduction is identical to the originals I have, there is no way you can tell Colt didn't build it. It was about $40 (instead of the $10-15 you'd expect to pay for a used part) but I wasn't complaining since I was so happy I actually found one.