I have a few comments.
First, thanks for the details about prying the vents off.
Second, eBay is definitely the way to go for the little plastic clips, but it's best if it's known that your going to need them as shipping can take awhile.
Third, where in the hell are you located that you can go to a yard and have at least 4 trucks available for you to pull parts from? My local yard just received a mighty max on Tuesday, the first one in about a year and a half, and I'm worried that by the time I get there sometime this weekend, every part I'm looking for will be gone.