I just pulled the hard drive out and reviewed the blue caddy. Part number is 1B31D2600. Wasn't sure what to look for at first until I started searching the numbers on Google.
I have posted images of the caddy in my system on a Postimage.org gallery for future reference (if anyone else needs to look it up). Here is the link: http://postimage.org/gallery/b0m8jjvm/
