[s-cars] assist needed- alt/ fan roller bearing needed

[JenRob]

s heads- anyone had any experience replacing the bearing behind the fan roller on the a/c-p/s-alternator
aluminum bracket on the side of the engine. sounds very complex but, there is a bearing behind the fan serpentine belt roller. mine is bad, and is making an awful racket. stealer wants large $$ for bracket assembly, says bearing is not serviced seperately. wondering if anyone else has experienced sililar problem ? any bearing part numbers availible ? thanks- rob