Here's a pic (from left to right) of the OEM AVC grommet, the donor auto body rubber "bumper" that was used to make the ACV plug, and my first attempt at making the ACV custom plug:
I ended up using another custom plug that turned out better (it's currently installed), however this pic provides an idea of what the finished product looks like.
The custom plug simply replaces the OEM grommet. The donor "bumper" was sourced from a Sears Hardware "hard to find parts" bin.
