because even though Eaton says it's not servicable, anybody knows that if it's got bolts, it can be fixed, repaired, or replaced.
If it's the tensioner pulley and the coupler, why don't you try doing it yourself? It's MAYBE $60 in parts and then some basic hand tools are all you should need. Well, you'll also need a turkey baster or something to suck the S/C oil out with, although you could just remove the snout w/ the rotors attached and just replace the coupler off the car. That way you could just drain it over a bucket or something.
Unless the actually MEANT the bearings and not the S/C coupler. If it really is the bearings, I think you need a press to install those bearings.
But if it's just the coupler...
http://www.zzperformance.com/grand_prix/products1.php?id=155 $30 + the install instructions are right there.
And IIRC, a tensioner puley is a $30-50 part at any parts store and only requires a socket set to replace.