Originally Posted by Chongo
I second sydney. You can always upgrade to the newer fancy housing, like Avid flackackets, that a lot of mailorder businesses sell. They also come with ferrules. Barrel adjusters are another problem. You might try buying a cheap used derallieur on ebay and cannibalize it. Good luck.
Before he goes skipping down the yellow brick road it would be good to confirm he really needs one.I have a Sram 7.0 that does not use a barrel aadjuster at the RD. And a used one out of a junk Rd might even be free at LBS.