ok, i've picked up the part today.
it's a little different from the one in the photo as it's meant for the wagon(says so on the packaging)
it's got 2 clips at the bottom of it to stop it from swaying around.
the clips are also different.
lastly, it's for ONE side, not 2.
i've scanned the install manual. you can get a better idea of that's in it and the aprt numbers and all that.
http://www.overl0ad.com/legacyfiles/F551SAG100%20Instructions.pdf