I've seen a few postings regarding the poor quality of the originals and lack of options for replacements.
I put these on my X9 mech last night and they seem great (well they fit at least)
[url= http://www.dotbike.com/ProductsP3992.aspx?Track=FGL ][/url]
It's the BDP05 model for SRAM
http://www.dotbike.com/ProductsP3992.aspx?Track=FGL
Gotta be worth a shot, my original one lasted for ages, the replacements seized after a month (though I forced it round and it's run ok ever since).
Nice sealed bearings too!
how do they fit with that weird double hole in the top wheel?
The double hole is on a metal cover which I presume you reuse?
Guessing from the bdp05 code we're talking bbb here. I've not used srams, but their jockeys for shimano are dead good! nice sealed bearings, and they set up well even in xtr - way cheaper than oe bits too.