Here's the one that I got. (On the listing on the right for the 8.8 of course)
I got it for $79, which didnt seem too awful expensive.
The fit and finish is realy good, It looks to be a very solid unit. There are 4 pieces to this and each is machined out of a solid piece of metal (not sure what, but I dont think its aluminum, hope not anyway LOL). As far as the retaining rings go, I honestly did not check, but when I test fitted the "side gears" to the axle (out of the car) the ring came through the other side, but not sure about on the car. I took the whole rear out of the car, not knowing, and upon further inspection, I kicked my *** because I'm pretty sure it can be done EASY in the car. Unfortuniatly the races were cancelled this weekend, so I did some doughnuts in the feild behind the house, and slid around a bit in the feild, and had no trouble. This saturday is a 50 lap race, so I hope the axles hold up.
Sorry I didnt get any pics of the install, was in a hurry to get it done, then the bastards cancelled on me.
Hope this helps you guys out,