http://legacygt.com/forums/showthread.php/fs-pa-vehicle-part-out-182992p11.html
It looks like one number 909130051 is the clip itself, while the clips included in certain parts packages which use them are numbered 90914007.
Those clips are a pain in the butt. They have a phillips type 'screw' that expands the clip when pushed in, making original installation a breeze by just pressing the clip into place or using a small mallet to set the clip. The phillips screw
supposedly can be backed out, most times, by turning counterclockwise with a phillips screwdriver while, at the same time, having to carefully pry off the flush screw from the clip.
They seem to break easily or the phillips head strips out making removal impossible unless you simply break the original clip. I would think they would include those clips in the price of whatever work you are having done.
Many times, small items such as these are charged so the dealer can pad the bill with extras to make a bit more profit on the job (like they aren't making any money to begin with)!
Maybe they purchase them by the box-full at only pennies apiece!
I have gotten clips that work just as well (or better) from my local auto parts store, however those don't have the option to turn half a turn counterclockwise to remove, which in itself is useless most of the time anyway as the clips many times end up breaking or in some way not working correctly!
In certain places, I have also used quality Zip-Ties in place of those clips, installing one, two or three Ties where the clips were and wrapping the Tie around two or three times through two connecting holes. I do that for the underbody front plastic splash guards and on inner fenders where the clips have broken or are missing. You may need to drill a hole in the plastic if you need to have a place to insert the Zip-Ties.