Medtro,
Just give them a call and ask for them. I don't think there is a part number... I just called since I saw them on the website in their "used" section. I was suprised that they had "refurbished" them for that price.
BTW, I installed mine this weekend with little problem. Just pulled the drive plates off, saved the gasket and installed the AISINs like butta'... Getting the circlip back on the axle inside the hub was a bit of a pain, but went pretty quick.
I couldn't get my driveshaft nuts/bolts to budge, so I soaked them with PB Blaster for later removal and completion of the project.
Jody.