SUCCESS!
I decided to tackle this when I had a little down time today. As is it turns out, the service department had only 1 unit in stock, and since their SKU's sell them in pairs, they just gave me one.
Pro: didn't have to pay for it.
Con: I only had one shot at this, and they suggested they often break 'em themselves trying to install them...
So here's how it went. First I fished the broken remaning pieces of the old cover out. I tried simply pulling the right-side "arm" straight out, but it broke the pegs off. Getting the lone broken "peg" out of the rightmost clip was a bit of a challenge, as there's noting to grab hold of at that point, and while prying the clip down, it's hard to get anything else in there to grasp the remaining peg shard.
I finally was able to slide the peg out sideways with a second small screwdriver. You can see the aftermath here:
I next protected the top of the door frame (which was a fulcrum point for my small screwdrivers):
I then went more carefully on the left side, prying down slightly on the left side of the retaining clip while grasping the protruding arm and pulling straight out gently. Once I felt the left side free up, I then did the same for the right side. I got that arm out with the pegs intact. NOTE: The clips appear to be plastic, so I'd tread lightly, as I suspect if you break them, the replacement may be "involved".
I don't have the pics of me actually pulling with the pliers(not enough hands), but this shot illustrates where I was prying slightly:
Once that was done, the new clip goes in. The secret seems to be to push on the "pegs" themselves, and not on the arm they attach to. This bending forces on the relatively thin attachment points. You can position the cover with the pegs lined up in front of the clips and gently push directly inward to seat them:
Repeat for the other side. They actually went in rather smoothly for me:
The hinging movement on it was a bit looser then the others.. so I suspect I had sprung the clips slightly. I pried them back "up" a bit, and it was pretty close to original:
All in all, about a 20 minute job going carefully.
Hope this helps somebody else... any questions, let me know.