I got a response to my post about NBC's Easter Egg promotion for the movie "Hop":
I realize that it's been a while, but I just watched 'Perfect Couples' on DVR and found the egg. I had to watch twice, too. It's near the end of the episode, when Vance goes to get a cowboy hat. It is yellow and is on the right side of the screen, on a shelf of hats, and appears to be propping a hat up.
And sure enough, Anonymous was right:
I realize now why I didn't find it even after watching it twice.
I watched the wrong episode.
I didn't bother recording the episode that night; I had given up on the series after two viewings. And I didn't get around to checking it out on Hulu for a week.
Therefore, instead of watching "Perfect Lies", I watched "Perfect Exes" from March 31.